would like some advice on a current project.

[Dougs Third Go]

as Tony says johnny, upload it onto youtube then embed it in a post. As for reducing your flag thickness, is there a monumental stonemason near you, as they'll be able to machine it to thickness.

 

[Colour Republic]

not read all the replies but can you not trench cut the back of the stone on a wet cutter then knock out with a chisel?