Anybody rounding out there square drive hub, I have Mercurys performance hub. I round them out and make them realy sloppy to were there no good.

If you are talking about the torq flo those are only rated to 400hp.

I have two types of flo-torq hubs. One is plastic and the other is metal. I thought the plastic ones were only rated to 400hp?

yeah, actually it is just the plastic one rated to 400. The metal one is for higher performance app.