First, what's your opinion of the vise approach?
Second, why a subtable? Was it just the shape of the workpiece that made more sense to do that way?
What work had to be done to make the subtable? Was it also machined true?
Having to build a subtable as large or larger than the main workpiece seems the machine equivalent of begging the question, LOL. If, OTOH, the subtable was any arbitrary piece of metal, not particularly true, and largely just there to provide a reasonably smooth sliding surface and a place to mount your leveling screws, that's another matter.
Cheers,
BW |