Got a CZ455 3 barrel combo from my friend for 400 dollars years ago, basically a new gun but someone over tightened the action screws and crushed the timber 2mm deeper than it should be, so the screws stick out on other side and stopped the bolt operate properly
You can change the barrel easily that means you need take off the stock and put it back much more often than others but just put normal torque on the action screw the timber beneath can be damaged easily
They really need to be pillar bedded. The Boyd's AT-one stocks like the one pictured definitely need pillar bedding as they are extremely soft timber and will compress with light screw tension. I fitted one to a CZ457 and found it difficult to tighten the screws with a torque wrench as the stock timber was so soft. The rifle shoots amazing though so I have not bothered inserting pillars and bedding it.