Its alive!
Tonight, we finished the M5 ( for now)
Driveshaft going on :
After we put the exhaust back on ( new bolts, gaskets, hinges and rubbers) I flushed the engine with Forté engine cleaner , checked vital signs on the hoist again after shaking it down and all was OK ..
The accumulated bills : ( havent added them up yet, but will most likely breach a barrier I never wanted to

)

The baddest of them all :
Cant put in words how good it felt to drive the car again, just got home and its very rewarding to only have the "brake pads" warning come on

since I took the wires off that when mounting the front shocks ( they will be replaced by 345ers soon anyways )
Short impression :
The Koni suspension is very harmonic now, the car feels very nice and stable. The touring ARB is a fantastic upgrade IMO, the car is much more neutral (keep in mind that I have one inch increased track on the front and 265er rear tires)
Second,
The engine. Without the AC compressor and airpump, it seems to rev more freely. Also, changing all the vacuum, TB butterfly synchro, new rotor + distr , new plugs etc etc all made their effort. Car was never smoother and picks up like a dream from relative low revs.
Kept the undertrays off to monitor the engine and possible leaks etc the next days, but for now, all is in order.
It bloody well should be.