Hi red leader,
I think this is due to the fact that I deal with the crankshaft failures and explain the problem with the owners who then discuss this with the M3W community and of course, failures with my kit fitted always come back to me for repair. There have been many failures with the original Centa unit as well - I have dealt with some of them - where most of those go and how well they are publicised by the repairers is of course beyond my control. Your "proportionally more" comment sounds as though you have some statistics which are not common knowledge - I would like to be privy to that info, should you wish to share.
best,
Phil