diff --git a/content/day2/99_networking.md b/content/day2/99_networking.md
index 402cc94..fa2ce8f 100644
--- a/content/day2/99_networking.md
+++ b/content/day2/99_networking.md
@@ -52,3 +52,7 @@ I should follow up
 
 * The paid renovate offering now includes build failure estimation
 * I was told not to buy it after telling the technical guy that we just use build pipelines as MR verification 
+
+### Certmanager
+
+* The best swag (judged by coolness points)
diff --git a/content/day4/03_operator.md b/content/day4/03_operator.md
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@@ -0,0 +1,55 @@
+---
+title: What's New in Operator Framework?
+weight: 3
+---
+
+By the nice opertor framework guys at IBM and RedHat.
+I'll skip the baseline introduction of what an operator is.
+
+## Operator DSK
+
+> Build the operator
+
+* Kubebuilder with v4 Plugines -> Supports the latest Kubernetes
+* Java Operator SDK is not a part of Operator SDK and they released 5.0.0
+  * Now with server side apply in the background
+  * Better status updates and finalizer handling
+  * Dependent ressource handling (alongside optional dependent ressources)
+
+## Operator Liefecycle Manager
+
+> Manage the operator -> A operator for installing operators
+
+### OLM v1 APIs
+
+* New API Set -> The old CRDs were overwhelming
+* More GitOps friendly with per-tenant support
+* Prediscribes update paths (maybe upgrade)
+* Suport for operator bundels as k8s manifests/helmchart
+
+### OLM v1 Components
+
+* Cluster Extension (User-Facing API)
+  * Defines the app you want to install
+  * Resolvs requirements through catalogd/depply
+* Catalogd (Catalog Server/Operator)
+* Depply (Dependency/Contraint solver)
+* Applier (Rukoak/kapp compatible)
+
+```mermaid
+flowchart TD
+    uapi(User facing api)-->|Can I find this operator|catalaogd
+    catalogd-->|Check if all dependencies are checked|depply
+    depply-->|Please install|kapp
+```
+
+
+```mermaid
+flowchart LR
+    oa(operator author)-->ba(Bundle and att to catalog)
+    ba-->catalogd(Catalogd Handle unpackling)
+
+    user-->ufa(User facing api)
+    ufa-->|Resolve package|catalogd
+    ufa-->|Create app on cluster|appcr(App CR / kapps)
+```
diff --git a/content/day4/05_certmanager.md b/content/day4/05_certmanager.md
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+++ b/content/day4/05_certmanager.md
@@ -0,0 +1,73 @@
+---
+title: "Cryptographically Signed Swag: Cert-Manager’s Stamped Certificates"
+weight: 5
+---
+
+A talk by the certmanager maintainers that also staffed the certmanager booth.
+Humor is present, but the main focus is still thetechnical integration
+
+## Baseline
+
+* Certmanager is the best™ way of getting certificats
+* Poster features: Autorenewal, ACME, PKI, HC Vault
+* Numbers: 20M downloads 427 contributors 11.3 GitHub stars
+* Currently on the gratuation path
+
+## History
+
+* 2016: Jetstack created kube-lego -> A operator that generated LE certificates for ingress based on annotations
+* 2o17: Certmanager launch -> Cert ressources and issuer ressources
+* 2020: v1.0.0 and joined CNCF sandbox
+* 2022: CNCF incubating
+* 2024: Passed the CNCF security audit and on the way to graduation
+
+## The booth works
+
+### How it came to be
+
+* The idea: Mix the digital certificate with the classical seal
+* Started as the stamping idea to celebrate v1 and send contributors a thank you with candels
+* Problems: Candels are not allowed -> Therefor glue gun
+
+### How it works
+
+* Components
+  * RASPI with k3s
+  * Printer
+  * Certmanager
+  * A go-based webui
+* QR-Code: Contains link to certificate with privatekey
+
+```mermaid
+flowchart LR
+    ui(UI in go)-->|Generate cert ressource|kubeapi
+    kubeapi-->|Issue certificate|CertManager
+    CertManager-->|Certificate|ui
+    ui-->|print|Printer
+```
+
+### What is new this year
+
+* Idea: Certs should be usable for TLS
+* Solution: The QR-Code links to a zip-download with the cert and provate key
+* New: ECDSA for everything
+* New: A stable root ca with intermediate for every conference
+* New: Guestbook that can only be signed with a booth issued certificate -> Available via script
+
+## Learnings
+
+* This demo is just a private CA with certmanager -> Can be applied to any PKI-usecase
+* The certificate can be created via the CR, CSI driver (create secret and mount in container), ingress annotations, ...
+* You can use multiple different Issuers (CA Issuer aka PKI, Let's Encrypt, Vault, AWS, ...)
+
+```mermaid
+flowchart LR
+    ui-->|Input certificate subject details|CertManager
+    cai(CA Issuer)-->|CertManager|Souurce for certificate
+    CertManager-->|Creates|sr(Secret Ressource)
+```
+
+## Conclusion
+
+* This is not just a demo -> Just apply it for machines
+* They have regular meetings (daily standups and bi-weekly)
diff --git a/content/day4/99_networking.md b/content/day4/99_networking.md
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+---
+title: Networking
+weight: 99
+---
+
+Who have I talked to today, are there any follow-ups or learnings?
+
+## Fastly
+
+* They were nice and are always up to talk if we ever need something
+
+## Ozone
+
+{{% notice style="note" %}}
+They will follow up with a quick demo
+{{% /notice %}}
+
+* A interesting tektone-based CI/CD solutions that also integrates with oter platforms
+* May be interesting for either ODIT or some of our customers
+
+## Docker
+
+* Talked to one salesperson just aboput the general conference
+* Talked to one technical guy about docker buildtime optimization
+
+## Rancher/Suse
+
+* I just got some swag, Maik got a demo focussing on runtime security
+
+## Kong
+
+* They didn't have any Insomina stickers and the insomnia guy apparently already left
+
+## Planetscale
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diff --git a/content/day4/_index.md b/content/day4/_index.md
index c1a008c..cd0cff7 100644
--- a/content/day4/_index.md
+++ b/content/day4/_index.md
@@ -1,4 +1,6 @@
 ---
 archetype: chapter 
-title: template
----
\ No newline at end of file
+title: Day 4
+---
+
+The last day with a limited sponsor expo (10:00-14:30) and a bunch of people on the move (not me)
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