For one thing the receiver bolt was so far out I would have filed right out of the arm to get the bolt in.
I did the same kind of thing as the video. The front has 2 saddles so I shimmed up enough on one of the saddles to get the rail straight and true and the hole lined up. Then built up with JB weld on the other saddle. One bit of packing tape around the barrel so the JB doesn't stick and some glazing putty(like for glass) on the rail to make a pocket for the JB to sit in. Once that dried and was cleaned up I did the same to the second saddle for a permanent fix. I think it would have taken the thickness of two .45 casings.
This was after I had to take a hacksaw and cut 1/8" off the front so it would fit at all, then re-grind the chamfer at the front.
And don't get me started on the cheap low profile screws supplied... the heads will be stripped if you take it apart more than 3 times with the supplied allen key. Get some proper machine screws.
I was suggesting that I may have an odd barrel profile because I don't want to come right out and say the advertising for the UTG rail and it's "bolt on" claim is a load of crap. It does bolt on but getting it to work properly is beyond what's advertised.
I suppose it would be fine for flashlights, lasers, dongle warmers, coffee stirrers and whatever else folks like to hang on their rails.
As for the stripper clip rail ... I'm using a scout scope setup anyway. I took one look at the sloppy fit, said pffft and tossed it in the spare parts bin.