MoonLite's new 4 position filter slide holds three 2" filters plus one over sized hole for barlow access into the OTA. It is designed to be mounted inside your dobs upper cage under your existing focuser.
Positive click stops and a removeable slide makes storage easy with out having to unscrew the filters when finished. Just put the whole slide with filters installed into a sock and keep in your EP case. Check your focusers draw tube OTA protrusion at focus, 1/2" clearance is needed before your focusers draw tube will hit the filter slide. Or block up your focuser to gain more height. Can be used with all different brand of focusers. Black anodized 6061 aluminum $119 each. See URL above to order on-line.