Join Date: Dec 2015
Location: The Very Tip of Lake Michigan
I built a rotisserie for restoring my MGB using 2" pipe and a pair of 2" pipe unions. Don't know if you have welder available, but it's a pretty easy affair welding a piece of angle to one side of the union, and welding the other half to the T post (X2). I rolled my car over quite often, so I also welded a piece of half inch pipe to the union nuts so I could loosen and tighten them easily.
Three or four hundred pounds is heavy to the human, but not very heavy when using mechanical means of support. So a couple of lags through the angles into the ends of the top for the duration of the project would be plenty of holding power. Then, when finished, simply make four pretty matching plugs for the ends. It'll look like it was designed that way.
You could also securely clamp a piece of, say, 3"x2" angle to each end of the top with a heavy bolt drilled in the center of the opposing angle. Then simply rest the axles on a pair of sawhorses. Not as sexy as a full blown rotator, but also no holes in table top.
Another $000,000,000.02 worth of advice,