The barrel retention design is very similar to the SSG3000. I have both and have removed/reinstalled the barrels many times without concern. Recall was Definitely due to user error
I have 3 SkeetIR-L and use all as “clip ons” with the FTS mounts. Adjust/zero the Skeet’s crosshairs/reticle to “over lay” on the day scope’s reticle at 1x. Then fine tune parallax with the ocular.
I have experienced the increased lens flare(not a deal breaker for me) but the biggest issue is the RPO ocular. The diopter adjustment moves by just looking at wrong (joking, but way to easy to move)