teachfox

i was looking at the bd-power plug n play by van aaken and was wondering if this box can be stacked on a tst pm3? i see it plugs into the injection pump harness and the map sensor so i didn't know if it would work stacked. would i be better off to stack the edge ez on it? if i upgrade to the pm3 comp will i acheive the same thing,i want more bottom end power? i have read the comp version is very hard on the vp-44 and wondered if stacking would be a better option? thanks for your time in advance.