I have a sightron s11, 6x42 on my Quad.
Optics are great but both turret knob dials came off and got lost while zeroing in freezing weather. I emailed the supplier (Midway UK) saying I like the scope and would rather not return it, could they arrange replacement dials for me to fit as the originals were held on with two very small dabs of adhesive.
That email was sent on 26/02 - no reply as yet.