I know they are good quality, I have bought two plus12-3sct's for the season, but even in worlds they flame out. Is it all about tuning issue?

Some users in Maxpower and JP racing thread complains about the bearings. I think those bearings are the same with Novas. Actually I expect bearings from nova to run at least a piston-liner's life, about 15ltrs.

btw I dont think OS is "much" cheaper than novarossi. rc-toro has a deal for 353'09 for about 360$ and 12xz is around 330-350$