A quick update here, I am in the progress of fitting the new motor.
I will get into the details later, but here are the key ingredients:
Custom twin scroll manifold is almost done, needs final welding on the motor flange side and overall planing of the flanges. I am working on the wastegates right now.
I installed the motor on a new support bar and connected everything. It started for the first time today and everything seems good.
I use a genuine RS4 maf with this setup and a 89mm K&N filter. We'll see how much issues this will cause later, maybe I need to fabricate some small airstack as I cant put more pipe in between filter and maf.. thats all for later concern, now I am focussing on the wategates and downpipe :-)

i love this project!

i dont think that tigwelding a tacked exhaust with all the soot and grime will be fun

Welding the tacked and grimed exhaust (with partial reused stainless pipes from the old exhaust) was a challenge indeed, and not too pretty. But I got it glued together eventually without it leaking. Good cleaning before welding helps a lot.
Well so I did a couple of runs, used it to daily to my job and done near 1000km on the engine now. There was nothing alarming when I removed the run-in oil, no metallic stuff. I did have some issues already, one leaking gas filter  (it touched some clamp and slowly grinded its way through, not linked to this new motor install though) and a faulty n75!
Yesterday I was logging to set up KFURL (load is following perfect but req boost is off) and I had throttle cut at 5000 rpm. I just drove it home in limp and found out that the turbo had its first big boy boost... I maxed out the 3 bar map, so well over 30psi  One of the gates had a small leak, a screw came loose on the diaphragm "hat" and was bouncing around inside, no damage though. But after fixing this (LOCTITE EVERYWHERE) and boost testing the system, the gates still wouldnt open! I found the N75 leaking into the TIP real bad, if I blocked it with my finger the gates would open right away. Time for a new n75... I put a straight connector between the lines for now, curious how boost responds now. Before it failed I would have around 1.1 bar boost at 4000rpm, creeping to 1.3. Airflow is 276g/s at 5800rpm, so she flows alright 
I still have LPG injector left, its running a little rich up top. I am confident I can make it to 350hp without any problems with the current setup so perfect for low boost. I am running the k03 timing map still, with zero pull. I hope to feed in a bit more timing under load today with the emulator, if the boost control is functioning properly...

Here is a small video that I made when I finished the exhaust to show the valve sound difference!
https://www.youtube.com/watch?v=U0LA0w_Dkco

The bus has been inside the garage for most of the year due to a much needed body resto.  
I have been way too busy with work to do any serious tuning or reading even on Nefmoto for that matter, but I intend to get back on it soon. I have found my last log from back in februari, after this I made a coolant tank for the AWIC system and optimized the pump flow. Havent been able to test the performance after this, but it should be a bit better.
Currently I am doing bodywork, but I have also refitted the entire front suspension with powerflex bushings, fitted a Cayenne Turbo brake setup all around and modified the hubs to suit 5x130pcd. I have a GTX3076r gen II on order to see if this causes a mayor difference in spool. For me, the engine has been spooling so good (early) that I would not even mind to see a bit slower spool and be able to keep better efficiency up top. To clarify, in the log you will see 1.3 bar at 4000rpm when the gates open but this is in 2nd gear. In 4th gear I have seen 1 bar as early as 3200rpm. I will compare both with real data before I decide which one will stay on  
I have also fitted a new tank with larger outlet, a new pump and 1000cc injectors. The 550cc and pump that was in it where maxed out already at 6000rpm and 1.5 bar boost as you can see in the log. It nets roughly 325g/s at 7500rpm.
So to end this message, here is the latest photo of how the drivers side looks now (all new welded panels unpainted but you can also see the wheels and brakes).


And one small video that I found on my phone (from last year). I promise that there will be more content when I have her al set up again...
https://www.youtube.com/embed/iIGGvnJbPII

So I will post again when things are ready for the street again