If you own one of these excellent grinders you might want to check out this thread I posted on the CoffeeGeek forum.
http://www.coffeegeek.com/forums/espres ... ers/349880
Stepless Macap M4 Mod
I added a return spring to the mod today. More info & pic in the thread.
http://www.coffeegeek.com/forums/espres ... ers/349880
http://www.coffeegeek.com/forums/espres ... ers/349880