Agew -- to answer your question above regarding boost w/ nanocom, the pressure is measured at the intake manifold from the MAP sensor, so yes, it is gross pressure (ambient + boost), as opposed to gauge pressure, which is only boost pressure. So while the Nanocom would read about 200kpa at full boost, a gauge would read 100kpa, or 1 bar.
And so I have to think out loud...
From what I've read I should be seeing ambient pressure (here at 4200ft it's about 87kpa) + turbo pressure (in theory 100kpa), for a total of 187kpa. Whereas someone at sea level would have 100kpa ambient + 100kpa boost, for a total of 200kpa. And the ECU is programmed to go to limp mode around 220-230kpa so you don't blow things up.
On my nanocom the highest I've ever seen it to be is about 130-140kpa gross, which means I'm only getting about 48kpa boost. I've realized through my googling that turbos at altitude are not a simple matter, but I'm going off of one basic assumption now: unless you're at some pretty extreme altitudes, boost/gauge pressure should be roughly the same at sea level and altitude, whereas gross pressure will be reduced, since there's less ambient pressure to start with. I would assume the ECU would go into limp mode at 4,000 feet if it detects more 120-130kpa boost pressure, same as at altitude?
So planning on shortening the wastegate rod and some 3,000rpm tests on the ring road here in KTM at night, the only time when you can actually get above 40mph since there are fewer cows, carts, horses and homebrew tractors to share the road with...