I just got your message. Very interesting.
My apologies for taking so long get back to you...I just checked in on the website, and noticed that I had a message. I have a small amount of experience with Iron Palm. I learned from Brian Gray. We broke 2-inch paving stones mounted on cinder blocks. Some of the other guys in his Iron Palm Federation, including my teacher (Ross Kellin) are very proficient - multiple bricks, backhand slaps, picking a slab in stack to break.
Somebody told me you have experience in Iron Palm. Could you clarify that for me?