3 BUCC Brass Catcher Mount

I don't like losing my brass as the effort to craft them for my rifles is quite time consuming so I use a brass catcher. I have tried a variety of catchers over the years but the unit made by 3 BUCC works the best, IMHO. The problem is that the plastic bit that mounts on the rifle is fragile and pricy. I included the Fusion 360 file I used to craft the mount blocks. A 4mm cap screw and nut is used to pinch it tight. Now all of my rifles are outfitted and I have some spares in my range box.

Update: I added another design along with the Fusion 360 file with pic for a mount that worked with the scope mount and forward Mlok guard. The stock mounting block does not fit at all. Tight fit but it works well.