Valco Tremolo

This is a tremolo built from Soldersounds excellent Percussion layout. It's a choppy square wave  tremolo effect similar to the ones found in old Valco amps. Sounds really cool. There's one issue though.. when I turn the speed pot fully clockwise the tremolo effect dies.
It really doesn't matter cause it's just at the very end of the speed range.. but it's a little bit annoying :-P