This is a 140mm x 140mm linear stage I designed to use for macro photography but it can be used for other things to. It is stackable so you can get left, right, forward and backwards motion M6 holes on the bottom and M4 holes on the top. The hole for the micrometer is 11mm.

You will need for each 9 M4 nuts 4 M4 countersunk screw 2 8mm smoth rod 133mm long 4 LM8UU 2 Extension springs 1 Ballbearing with outer diameter of 13mm inner diameter of ~ 4,5mm 1 Micrometer that will fit a 11mm hole