Another question, i wasn't going to ask becasue the project moved forward and past thei point but i have been wondering about how you drill through the stone into the iron frame.
Do you lay the stone down then drill through the stone and into the iron frame, all one drilling operation? I don't see how you could do that becasue i would think you need different drill bits for stone and for iron.
Do you pre drill the hole in the iron frame first, then lay down the stone slab and try and drill throught he slab and exactly hit the pre-drilled hole in the frame? And are you drilling from the top down, or are you under the frame and drilling up, which i don't think is the right answer but if you did it that way you would get a good line up on where the hole in the frame ends up.
You must have really good drill bits and a powerful drill, is it an air driven drill or electric? What kind of drill and drill bits do you use? Do you sharpen your drill bits (is that even possible) or just buy new ones?
Harv, if you want to rest a while between anwsering my lotsa quesitons that's okay

many thanks for the education you provide for all fo us...