You probably could put an LX90 on an ultrawedge if you made an adaptor plate or took to it with a drill but I doubt that would solve your stability problems. The fork arms on these scopes (both LX90 and LX200) are not strong enough and the tubes are heavy. I spent ages trying with my LX200, ultrawedge and permenent pier yet even the slightest breeze would get the forks moving and ruin the sub. If you intend to use these long focal length scopes for long exposure AP they really need to be deforked (or buy a seperate OTA) and place it on a high quality EQ mount. The scopes are built to mount alt/az and thats where they perform best. You could always try a de rotator to remove field rotation and mount it alt/az but there is lots of argument about these units and I never had much luck with the meade version. Thats not to say they don't work as some people swear by them, just haven't seen any really good results myself.
Mark
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