Preacher, you can do the beveling by hand. With my old MBW I just removed the old tube, I found the biggest drill bit that would fit between the CGs, and chucked it up in my DeWalt. I held the case in one hand, held the drill in the other, eyeballed it and gave 'er a whirl. I didn't remove much metal and tried a test fit. I repeated it a couple times until I was happy, then I put some Loctite on the tube threads and screwed it in. Then I put the crown on the tube and screwed it all down tight.