CG, that' s a great idea. What diameter should I go with?

Bobco, My press doesn' t have a " safety strap" . I bought it about ~3 years ago, maybe my e-mail prompted the inclusion of such a strap.
I assure you it DID happen, I wouldn' t just make such an occurance up as it wouldn' t benefit me whatsoever to do so. The knot tied to the hook that goes to the center of the bar is the one that lost it' s middle. It pitched the middle right out of the outside casing.