Thanks guys, the chain seems to work great...I stack two from Hydrasynth clock out (one to Maths, one to O_C). Stack the one plugged into Maths to go to Quadrax, and stack the one in Quadrax to go to Disting EX and everything is in sync. I'm sure there are tons of other/better uses for stacking but thats what I've used if for so far

JB