Anyone have any good techniques or suggestions on how to cut larger slots in an aluminum spinner? I have a dome spinner for the Super Stearman that needs bigger slots. I have an APC 18X6W that doesn't fit. I purchased the 2 3/4 AT6 120 Tru Turn as some had suggested but it is bigger and still doesn't fit the prop. If I am going to hone out new slots anyway, I would like to do it to the stock spinner that came with the kit and return the $45 Tru Turn. Any suggestions? I've never done it before. Thanks.