Assuming that your shooting continues to be club level singles targets the ability to adjust your gun for different disciplines such as doubles, skeet or sporting clays is of no importance to you. What is paramount for success is fit. If a gun fits you well without adjustments then an adjustable gun won’t make it fit better or increase your scores. Perhaps to get the fit you need you require an adjustable comb, butt pad, rib, trigger or whatever but if you don’t need them then they simply add unnecessary expense, complication and potential failure points. Yes, breakage or sloppiness, nothing comes without a price. If a gun fits without adjustment simple is better. Many many singles scores of 100, 200 and more straight have been shot with a good fitting good quality gun with fixed chokes and no stock or rib adjustments. Spank is correct in preferring an adjustable gun for himself as a dedicated competitor but you aren’t competing against anyone but yourself. I’ve shot a lot of trap over 40 years or so and competed seriously for 25 of those, I’ve owned BT 99’s, 99 Plus, not familiar with the CZ. For myself I know that old BT 99 in not modified will fit and I would buy it. Your choice may be different. Have fun, break ‘em al
Spot on advise . I have a buddy who went from a Uni barrel Beretta to a Browning 99 he shot it well but it beat the snot out him and he is a big guy . We added a Mercury recoil devise it brought the Browning up to the weight and balance of his old gun and he has run many straights with that gun . And I love his old Beretta under barrel which I stole from him.