Thanks ..
I will check out those mods for sure
Im going to look into building my own stuff .. I used to breadboard 20 years ago
Im finding adsr and vca are just too pricey .. If i can learn cv controller voltages ..ill be on my way

Im going to buy a 2 channel oscilloscope kit and modify that to ER format

I figure it will cost 60 bucks and 4 hours work .. Throw a 7809 to power and draw off the +12 rail .. Use a blank pcb board as the face plate .get 2 @ 3.5 mm input jacks .

Then a want to build basic AR envelops .. Just to trigger the vca i will make next.

You rack is cool btw .. Your vcos look nice and hand crafted on tje top right

You have fun too ..