After years in its case I have re-mounted my Ceravolo 216 f/6 Mak-Newt. Fabulous scope. I want to hang my TV80 on top of it, as I did in 2006, but on a dovetail not a fixed attachment. That way I can swap with a small solar scope. Can anyone point me to a dovetail which will accept the 4 #20 screws that are on the rings of my Ceravolo? See photos.