Cheers Oziray, some nice ideas.
Do you think that I might need some downward fixing force though to keep the protective top flat though? The top will be about 4'6" by 2'4" and my workshop can get a bit damp.
I want it to be quick release so I think bolts are out but I like the cleat idea.
A, 'plywood butterfly cleat'? Do you mean like a home made cleat you turn that would prevent lifting of the protective top?
I suppose if there was a thickness difference between the different edge bands and an angle on the turning cleat it wood give me some sandwiching force to pull the two tops together. If you see what I mean?