quick update, no pics, but we fired it up last night after getting the last hard and soft line in.
everything connected to the rear accumulator bled fine, we can get clean fluid through there - this is progress! - we now have 1/2 of the front brakes working, along with everything out back!
still has issues feeding fluid to the front accumulator though, same as before. noodling through that with the RROC guys at the moment, and we'll see what the next step is.
if it means pulling the pump then so be it, but im not totally convinced yet that thats the issue - pump doesnt make noise and i can feel the feed line pulsing like the pump is doing something... we'll see!
will have more info later