got one i like it ,dont trust it, always place rifle on table if you move away from it,, i bought a second one and my chronograph screws right on like its made for it PRO CHRONO just unscrew top middle nut and remove plastic holder ,thats it ,,the screw stands right up for you,,i use a small rabbit bag a lot and not the holders provided i spin the whole unit 90 degrees and balance my bag there ,the next thing we all should do is make some kind of tie down ,so if the BP unattended it wont topple over i put mine on the bench in front of me PAT