Install went as expected. The bump out shelf was over a framed shelf. Discussion with HO during sale= there is probably wires running through that open area. HO- No there is not, look at the outlets, I'm sure there are not - I know 90% chance there were and was correct. Luckily the wires where sloppy loose and could easily be stapled, appropriately like they should have been.
Assembled pushed to monster in and out a few times. It was gut n tight. Figured 1/2" R.O. on all sides, just enough. Didn't put both circular saws in the truck. The left handed porter cable don't do right handed 45's to cut the column at the fireplace mantle. That's an extra hour I'll never get beck. Plunge cut with circ saw, set the bosch jig saw to 45, got the hand saw out... said the hell with all this crap. Back cut with coping saw and finished fitting with block plane. The face marble on the mantle bowed in an 1/8" of inch.
Pulled the tile, set new and thought it was all done but grout tomorrow