UniStar heavy deluxe alt-az mount from Universal Astronomics, rated to 30lbs, compatible with GP, CG, Synta, Orion, etc. dovetail rails. Included in this unit is an optional dovetail mounting plate. Mounts on tripod with standard 1/4-20 bolt threads, but you can contact UA to adapt the mount to any non-standard tripod you might want to use. $320 shipped in conus, add 3% for PayPal.