Quote Originally Posted by charlieuk View Post
. . . like I mentioned I'm a bit worried about getting the bk blocks all lined up so thinking maybe make some plates up like in the pic just to allow 1.5mm ether way incase the holes are not perfect. but now just thinking maybe I would be better making a bracket from angle ali and using a fk support instead?
If you want to go the route you have drawn then you can make the mounting plate into a tramming plate. Add a cup-point grub screw to each corner which contacts the RHS underneath and allows fine tuning in/out and various angles. When aligned the bolts are tightened down holding the plate in this position. Be aware you are relying on the stiffness of the cup point area contact with the RHS to give the stiffness of the axis as seen by the machine, but if this worries you once it is set up you can remove the plate, cover the underside with machine epoxy and tighten back down. It will set with the alignment position you dialled in using the grub screws.

See here post #23. Grub screws around edge of bracket give alignment, then main bolts tighten against them:
http://www.mycncuk.com/threads/9141-...gestions/page2