I didn't pay anymore the cross bolt version, which was factory installed than other 458 Lotts, (new) from CZ currently out there. As far as service, I have nothing but good luck with them. This is the first time I have heard on a forum, first hand, of a stock splitting incident. Having said that, CZ is not the only mfg. to have had the problem. They probley should have started cross bolting a long time ago. Then again, there are a ton of CZ Safari's out there being used in Africa and all over the world that don't have splitting problems.
I have two like I said before, a 416 Rigby Hogback with no cross bolts and a new 458 Lott American Safari with them. Both are very well built, with close tolerances and incredible accuracy.