Astromania 1.25″ High Precision Double Helical Focuser with 0.05mm Scale for Telescope Lenses/Finder & Guidescope

This focuser has been returned for the reason noted in the Subject, but I would say that if it works in your system, then it appears to be a decent unit.My problem stems from looking for a helical focuser for my OAG, which currently has a rather clunky mechanism for focusing. An important point is that the bottom of the camera (an ASI mini) is about 19 mm from the body of the OAG. Any focuser (and needed adapter from a place like Preci$e Part$) must work with this.On the Astromania, the circular tube comprising the bottom M31 adapter also serves as a seat for whatever guide camera is inserted. That tube is about 18 mm long. With the adapter this would be a bit longer, and all of this was measured at home, inside, etc., so there is great uncertainty that it will work at all with my rig. So I returned it. Another brand (more expensive) apparently does not have this limitation (a rep at a store 100 miles away checked for me).Again, I think the unit itself seems to be very adequate for this job, as long as your needed distance is far enough that you have some leeway either side for focusing. This is certainly why there are both good and bad reviews found here.[On the side, I found the mail packaging and original box to be very poor. It was not protected by a larger box and showed signs of having been under heavy weight. Inside the mailer (heavy paper) the box itself (flimsy cardboard) was partially pushed in, with a thumbscrew being bent–easily straightened out but still…Additionally it was obvious that this was a second (returned before?), since the plastic bag inside the box was damaged and torn, indicating someone else taking it out before. The box itself was missing an end flap too–more evidence. ]