I've had two Leupys. The first tracked so poorly I returned it multiple times. They were unable to fix it and sent me a new one. I sold it unopened.

Fast forward 8 years or so and I need an ultra lightweight scope for a particular application. I held my nose and bought another that fit the bill better than anything else I could find. It seems to track fine. Go figure. Roll the dice and see what you get. Many of them DO seem to work fine.

Custom turrets aren't for me for a variety of reasons, but I can see the utility. If you plan to use the scope on just one rifle, shoot just one load, shoot in areas with consistent air density, and don't try to shoot out past 600 or so, they are probably fine. Too many limitations for me, but I won't bash them out of hand.