Blimy, real first hand stuff. Like I said I've never seen it, seen lots of early ones hung off the bell, but not a broke one. I can see the leverage when hung thus, and am quite uncomfortable seeing it done.
The above is good enough for me not to do it, I'll heed the warning. Not that I use an engine stand, I use the floor, they can't fall off the floor. If I made one it would be like some I seen in the service bulletins. Supporting front and back, pivoting on a ring in front so you can fit the cam through the ring. The modern type ( the hang from the bell or off the exhaust ports) always feel wobbles to me. And you have to swap the engine around to port or clean up the exhaust ports.
Thanks for the answers.
Martin.
off to hijack another thread, but hopefully keeping it relevant.