Behringer - CS100
Compressor Sustainer

I honestly dont remember much about bending this one. There is just way to much going on. A built in light. LDR. Button. Switches. This one has got it all and in hindsight "less is more" would probably have suited this well haha.
But going all out is one of the fun things when circuit bending behringer since they are such budget guitar pedals.

Inside Picture