Nicely planned, horribly engineered, badly advertised - Ncstar Pistol Accessory Rail Adapters

This product looks so good out of the box. I should have taken a picture because by the time I got it to fit a 1st Gen Glock 17 as advertised for, after 45 minutes of grinding with a Dremel it was a black anodized and roughly hewn raw aluminum mess of a piece that finally fit the trigger guard of the weapon as it was supposed to.
A lot of reviewers have been (seemingly) unhappy with this piece and I have to count myself among them, if the screw size is an issue, include other sets and if the thing is going to require purchaser machining because one size DOES NOT fit all as advertised. Warn us.