Install of the Lakeline TX-22 Fiber Optic Sights (With Issues)

I purchased 2 of the part: FA-SFR-TX22-STD for our TX-22s.
The second set I installed on my wife's pistol was a much better fit, due to what was likely an overmilled dovetail on my pistol.
I ended up having to drill a mounting hole on my rear sight to line up with the factory hole in order to properly secure it on my pistol.
Why Lakeline does not use the factory mounting hole is a mystery, their system is to use a set screw and completely ignore the factory tapped hole, which makes a rather unstable connection.
I've posted a separate video, which I emailed a link to their customer service, expressing my concerns with their design in the hopes they can improve this product.