Had a reply from Chai, says it should be 9-10 days from now as something to do with fed ex and HK I did not quite understand but nice to know they are on their way.

So I have been thinking about siting this machine on a concrete slab poured on top of my garage floor which currently is not particularly level. Has anyone done this before? if so what sort of thickness do you think I would need? I was thinking I could lay down about 1" and then screed the top with a self level compound?

Then once I have built the frame bolt that down to the pad (hopefully eliminating too much twist) and then do some of this wizardry with self leveling epoxy?

Does this sound overkill or feasible? I am going to this much effort on the machine I would hate for a wonky floor to put pay to the accuracy.