How about the engine not coming off the pipe after a high speed pass and\or a very insensitive low speed needle ? Tank pressure related maybe ??

Tank in question is on my LD3...engine is a new 12TR....everything is fine, no air leaks, no tank leaks etc etc...can have it blubberingly rich on the high side but the friggen thing just won't come off the pipe properly after a high speed pass and I can go nearly 3 turns in and out on the low end with little or no effect I've moved the pressure nipple on the stock pipe, tried various lengths of pressure line, tried the single chamber NTC3 pipe etc etc...pissin me off it is

Hey would the hole in the banjo being opposite the hole in the valve assembly have much if anything to do with what I'm talking about ? I'm considering drilling the single hole in the valve assembly straight through in an attempt to keep a head of fuel when I come off the throttle.