Success!

Apart from some places that remained a bit unmixed, the rest has gone hard and is mirror smooth.

Removed the reference frame, alu still 'stuck' to the epoxy.



Then, a bit of prying with a crowbar and both parts are off.

The remaining epoxy is smooth and even has the tooling marks that transfers across from the plate.

A quick test with a straight edge confirms all is good. A quick test with the rails indicate they arent perfectly straight (This will be fixed as they get bolted down).







Next step is to drill two holes, around 1/3 from each side and mount, get basic alignment, using reference piece for X travel height calibration. Marking the rest of the holes, drilling, then mounting with another alignment test. This takes ages as I need to go to around 26mm from memory and there are many to drill into this hard concrete.