Some comments about the RR411 here from cycle clinic.
Load of bollocks in my experience. I've built 2 sets of wheels for Cycliste with RR411 rims. She loves them, they were a joy to build, they've stayed true, and they show no signs of fatigue or cracking despite heavy use.
Probably just get a sim works again. Or a deda superleggero RS.
Some comments about the RR411 here from cycle clinic.
https://weightweenies.starbike.com/forum/viewtopic.php?t=150848