Hello,
yes, i think they can work, just need to do a good thrust bearing, UDO's 3 pieces thrust is impressive, i don't "understand" how it's possible to put that 3 (6 with the other side) screw just under the main bearing...drill on each side or drill all through the main ?? icing on the cake it seems to fit in the STD case machining (around 73mm of the shoulder)...
I'm actually working on BMW conversion but with a WBX/T4 pattern, i'm a little confused with how to put these screw and if i machine more or not the shoulder on the case...(to use all the surface available from the flywheel which is 75mm, just for 1mm extra reach)