The studs go right down to about the base of the cracked off part. The studs do not go into the head below the point where the rocker stand cracked.

I could not find any close-up photos of the area that I took of the heads when doing the mock-up, but I think that I noticed a small zig-zag pattern in the aluminum around the top part of the rocker stand where it is now cracked, but I thought it was just some scratches from where that area was machined.

Anyhow I will have to take a close look at the other head too, and see if it has any signs of cracking?