100mm, 125mm or 150mm guidescope/finderscope rings mounted on 4" Losmandy style Dovetail Plate .  3/8" aluminum adjusting screws with large 1/4" Delrin Tips.  Stainless steel and anodized aluminum throughout for maximum durability.  This is a great solution if you want to mount you guidescope on a Side-By-Side style dovetail assembly.