On the return Q would a fitting in the (return) line with a carb jet (or similar, NPT pipe plug) drilled to a particular size give the proper amt of return flow?
The problem with that is its "hit and miss". You could run a 3/8 feed line and a 1/8 return but is that enough or too much ?!?!? This is why I think they recommend a low pressure pump - adequate to keep the surge tank full "most of the time" but not enough pressure to require a return line.
The alternative (in my opinion) would be more volume and a return line with a regulator set a hair below the surge tank's threshold.
