Well boys - it lives.
As it turned out, I had a 90 deg reducer bend left over from one of the other turbos I had on my car at some stage
So it's running - I took it for a burn tonight - boost comes on heaps earlier - I can tell cause the BOV makes heaps more noise, and earlier, compared to when the 3040 was on.
My dash lights are all busted (fuse I think and havent been f'ed fixing it), so I couldn't see tacho and boost guage - tomorrow , I'll get a much better idea of what is happening.
Quick tune to make sure everything is in order and lets see what happens.
Shit I have learned a lot about turbos doing all of this.
You can theorise all you want - but see shit for yourself really drives home the differences in compressor size, AR, turbine size and what effects these have on the charactaristcs of your turbo/engine combination.