Flimsy, wont hold setting - FAB Defense MBA Mono-Pod Buttstock Add-on

I spent 3 hours machining the butt of my archangel stock to fit this thing, filing in a dovetail V and i was very happy with the end result. Until i took it to the range. It survived the first day, but started to slip, 18 rounds 140 grain 7mm rem mag, apollo S muzzle brake. I stepped up to 162 gr. And the pogo bent. Now i am looking for a replacement in aluminum or stainless steel very frustrating when your right there on edge of your shot and the pogo retracts because its made of inferior plastic. Great engineering, bad people trying to save weight and money on materials.