Hi all, I'm looking for a bit of advice concerning my ST 8O. I've ordered a set of tube rings for it so that I can turn the OTA when it's mounted on my EQ1 mount but I'm having a problem getting the mounting plate off the tube itself. I expected to just have to undo the two fixing screws on the plate and it would come off but when I loosen these the screws just keep turning, which suggests to me that there are nuts behind these screws which are loose and these are spinning when I loosen the fixing screws. My next thought was that you must have to take the black rear focusing assembly off thereby allowing me to hold the plate fixing screw nuts in place while loosening the fixing screws, but when I removed the three screws from the rear assembly it withdrew only very slightly and seemed to be catching on something inside the tube. I don't wont to pull any harder on the rear assembly in case I do it some damage. Am I missing something ? Any help would be appreciated guys. Thanks.