Do the screws loosen?( loctite?) otherwise, do the screws strip? ( that WOULD be mfg. fault ) but mine were very good grade screws,otherwise why is it a “ terrible “ base design ? Stock bolts coming loose ? Again torque and a thread lock this ,again, the assemblers/ owners responsibility,,isn’t it? I don’t know anything about the cheek rest hardware ,mine is a custom one, made in my shop,by me,for me not adjustable and permanent,I’ve had no problems with extraction ,different ,it’s a rimfire but 0 problems and I’ve shot scads of ammo,last year 21 weeks and about 150 rounds a week between practice and competiton score plus it’s my small game rifle.(BMR) .22 lr.