Quote Originally Posted by Kip View Post
A honking big lump of Al mixed with a tube and a 20mm NSK

Great minds think alike

The honking plate holds the screw square to the quill with minimum flex, I was thinking two 8mm pinch bolts at the back.

One vital feature missing in your picture though, probably early days and not forgot but still worth mentioning, you have to be able to release it before you hammer the chuck out of it's taper

I don't have any convenient flat to bolt a plummer type bearing mount to so I have to extend the sides of the quill housing forwards. This is almost convenient because it ain't easy to get a precise measurement for the separation 'twixt spindle and screw, I thought a bit of slack before I drilled the fixing bolts wouldn't be a bad thing.