Up to now all of my bowls have been small, in the 4 to 6 inch range. I'm ready to try some larger ones now, and have some nice blanks. The 12" by 4" isn't a problem, but the 11" by 8" one is heavy. Will the 3" faceplate that came with my lathe (Nova) be sufficient for roughing and creating a tenon? It has only 4 screw holes. If so how longshould the screws be?