Just talked with Schroth. It didn't sound very positive with regards to release dates with a QuickFit for the M3. I asked what the alternatives were, thinking the Profi ASM 4 might be an option, but he pointed me in the direction of the Rallye 3, saying that this harness would not put on any extra load on the seat back in a crash as it bolts into the rear passenger seat belt hardpoint on the C-pillar. Does this mean there is an issue with the testing?
I think I am going in this direction, if nothing else, it will hold you down and you can use the stock belt as a restraint. It kind of doesn't look as sturdy as the other belts, but then again - take a look at the belt you have been using so far!