The TSO takes standard 75 series recoil springs. CGW, CZ Custom, Wolff, etc sell both stock and lighter springs.
Most folks settle around 11lb for lighter competition loads. The stock 16lb is good for hotter NATO loads. Anything in between should work.
The buffers will wear out. Change them before they start to fall apart. Some folks don't run them over fear they will come apart and jam up the action. The clear vinyl buffers seem to last the longest. I've found they change the ejection distance of spent cases and alter the felt recoil slightly. I don't think they are required but the factory includes them for a reason. They are like most cz parts, they come when the slow boat arrives.
Cheers,
Toby
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