Hello Kel,
thank you for your reccomendation around FM synthesis. I also have the Rampage which can use one function generator to also do a lowpassfilter if it's free. The open case was scary as hell so I got a nice strong 3mm foam board to cut my own blank panels. It's not the 2mm like the panels, but close enough!
And thanks frank! I'm really grateful for all the post on here wich tought me to first understand what to do with just little things I I can then expand. I also did my mistakes already as I now see how the 2hp sine might have been a little weird of a choice instead of a basic 2hp vco which would have square saw triangle and FM input. But thats just how it goes.
here is a look at the barebones with the diy blanks
The Machine: https://www.modulargrid.net/e/racks/view/1601144