I came up with something completely new! Something never ever done before! I’ll revolutionize my woodwork and that of everyone who reads this! I made… (drum roll)… a planing stop! Such a lockdown is great for finally making some long postponed projects.
I found out the trick is to give the block a slight angle towards the back, so the pressure from the plane will push the back down onto the workbench. This gives it more stability. Easy tool, but very useful. See the drawing 🙂
Edit: The above is irony!