Vintage Simmons Drums (UK) Users Group

OK so heres another question regarding this...It has a number of 
sockets on the back for damping sustain etc does anyone know what type 
of pedal(s) works with this...is it variable pot or momentary open 
close or latching open close or a mixture of these?...now I have it 
I'm quite getting into it, its fun playing harmoney with drumsticks , 
oh and my partner/kids are getting quite addicted (the xbox hasnt been 
switched on for 3 days!)