I think the 3 position M70 type safety is fairly dear, in the hundreds I think fitted. There is an Australian in Victoria who posts as PC who will know for sure. He is on AccurateReloading so I would post up there on Big Bores.

The CZ only really needs bedding. I do my own bedding but I thing the going rate runs from $100 to $150. Someone doing the bedding for you could also put an internal cross bolt in at the same time.

It is a bigger deal to do a cross bolt that shows externally because you are involved with stock finish and the finish on the end of the bolt.

The cross bolt is in reality the counterpart of steel reinforcement rods used in concrete.

Although on some rifles like the earlier Sakos with a small Mauser type recoil lug the cross bolt is used for the action recoil lug to bear against. The idea of doing this is to effectively increase the area of the action's recoil lug.

But if you just got a CZ bedded and both its action recoil lug and barrel mounted lug and there is a small clearance behind the tang (it only has to be thous) then you will be OK.

Mike