What do you think of my idea which probably some of you may think its a waste of money on the extra epoxy resin.

There will be 2 gantry sections so the z axis is boxed in the middle.

this is just a quick rough up, the red pieces are the epoxy resin fully cured

1. weld the steel box sections together

2. lay the sections down on a level surface and pour epoxy resin

3. after 10 days or however long it takes to cure flip the sections back to normal position.

4. attach gantry side plates and adjust and bolt to as square as you can get it.

5. again pour epoxy resin to level both sections on the same plane

6. attach the linear rail on the front of the sections and then use a magnetic gauge indicator and use the top to line up the rails.