alf, 
For the past couple of weeks I've spent my evenings modding my Behringer RD-3.
It's a fun way to learn some basic #electronics
..and to get a cheaper Roland TB-303 ;)
Turned out pretty good and sounds even better!
Mods:
- Lower cutoff
- Hollow square
- Filter overdrive deluxe
- Rubber mod
- Softer VCA attack
- Higher resonance
- PSU mod
- Manual accent
I'll write a blog post about the process soon, but for now, here's an image
