Hello all, hoping you more experienced chaps can just answer a couple of questions.
The first is regarding leaving stuff clamped to the bed of the mill. The pic below is typical for me , it's an infinite vice kind of thing for the size of plates I work with - typically about 8" long. I have further strengthened the arrangement with some clamp bars, just to save it slipping when under load - i.e. With a workpiece in.
The gap in the middle is a nice space to clamp in my normal milling vice in.
The question is , is it ok to leave this setup as it is for extended periods? I don't go berserk when tightening down the fixtures to the bed.

The other question was regarding ' chucks in chucks'
I currently have a myford 7, but have just acquired a GH1330.
I realise a smaller chuck can be clamped inside a larger chuck, but I think I'm correct in saying this is only safe for turning between centres.
I had an idea to keep my 100mm 3jaw SC, 4jaw SC, and 4Jaw independent chucks for two reasons. Firstly to use them on a rotary table ( I would just buy a myford thread adaptor for the table ) and secondly to use them on the new bigger Warco.
My idea was to purchase a threaded backplate as below, and mount it int a recess cut into a standard D14 camclock backplate. I would simply then mount this assembly, and screw on whichever chuck I needed at the time. My warco only came with the standard 3J chuck.
Does this sound sensible, or do you have any other suggestions? I'm not building missile guidance systems, just fly tying vices and accessories, there's a pic of the myford backplate, and the sort of thing I make below.
Apologies for the waffle!

