Hello i dont know about the Skywatcher mirror cell base but if it is the same setup and configuration as the Meade Lightbridge then Bob`s Knobs are made to suit. I have been looking for the same to suit the GSO 12" Dob I have, the Lightbridge base looks like they are exactly the same as the GSO
http://www.bobsknobs.com/Meade/Dob/Lightbridge10.htm