are you concerned about the integrity of the shaft after grinding on it? such as it developing a stress crack or somehow affecting the metal leading to failure?
(i don't know anything about metallurgy but i do know that there's specific stuff you can and can't grind on)
The way you worded that isn't quite right. You CAN grind on anydangthing you want to. There are certain thAngs you ain't SUPPOSED to grind on. LOL He's not top fuel racin, so hopefully he'll be ok. lo
