Holding vice to table advice

[irving2008]

What you propose is essentially what mechanik suggested, make your own clamp plates patterned on the ones you already have, out of 10mm plate milled down to 9.5mm at one end. Personally I wouldn't go to the trouble of making hold down blocks.

I wouldn't put some paper under if you plan to ever use the vice jaws as a datum. Put a dti in the spindle, make sure the table and the bottom of the vice are scrupulously clean and clamp it down. Then measure the height of the top of the jaw or the lip in the jaw or a parallel held in the jaw pressed firmly down (I.e. lightly clamped and then tapped down) against the vice base as you traverse the table. One or more of those should be a flat datum. Putting paper in there, even tobacco paper, will destroy that IMHO but try it and see for yourself.

Ps, if you don't have a set of parallels get some, essential kit for milling IMHO.