O.K. a stab in the dark, but worth a shot. I am looking for 22-24" altitude bearings (with a centre hub for DSC mounting) for the dob I'm building and a 17.5" Kriege/Berry style (or similar) mirror cell and tailgate. Haven't built the mirror box yet, so if you've got anything, I can be a bit flexible on the dimensions. Used is fine as long as they are in working condition and not too smashed up. Thanks and clear skies this weekend!!!