I have it!

Yup.... Hand mr a roto-hammer, point me at a block wall, and I'll find the rebar, at least three tries out of four.

So ... here's the question ... anyone have any tricks for cutting rebar in the wall? My carbide core bits barely scratch it. There isn't room for a saws-it-all to get in there, and a cutting torch isn't part of my kit (maybe it needs to be!) Hole saws need a solid center for the pilot to guide the bit - and by the time I find the rebar, I've taken the center away.

Yesterday's project involved connecting an MCC to the gutter on the opposite side of the wall behind it. It's not like I could move the holes over an inch.