A little background - I've had this 14" Meade for 13 years. I de-forked it a few years ago and placed it on an HDX110 (EQ8) German mount (in an observatory), primarily because I use a photoelectric photometer and was limited to access in the northern sky (photometer is long and bottomed out on drive base of the LX200 fork mount). Moving the scope between variable and comparison stars is a relatively short distance, so moving it back and forth using the directional keys is quicker than doing a GOTO.
That being said, the only issue has been occasionally finding myself in an awkward position finder scope wise, so I decided to add another finder 180 degrees from the existing one. I purchased a 6 x 30 right angle finder the other day and decided to mount it this morning. Everything was going well until it suddenly wasn't.
On the side of the rear cell, midway between the mirror lock knob and focuser knob is a 3/4" x 1 3/4" plate, held in place with two #10 cap screws. The screws have always been just finger tight and upon removing one of them I could see a threaded backing plate. There doesn't seem to be any particular use for this plate so I thought it would make a good location for the second finder. I then removed the second screw so I could determine whether the finder would be better positioned in the hole closer to the corrector or closer to the backside. I chose the most forward hole, then placed the finder base against the cell and inserted the screw (one screw would be sufficient since the finder is very light).
That's when things kind of turned sour. As soon as the screw reached the backing plate, it (the backing plate) dropped down inside the cell housing. I had made the (incorrect) assumption that the backing plate was affixed to the housing, but obviously it was only 'stuck' there by so many years of contact with said housing.
If you're still reading (thank you), the problem I now have is a loose plate flopping around inside the cell. I doubt it'll interfere with anything, but the thought (and sound) of it moving around in there is bothering me. It appears that the only means of access would be through the removal of either the mirror lock knob or the focuser knob. I've never had reason to remove either and am somewhat hesitant about attempting either without consulting someone who's (successfully) done one or the other.
By any chance, have any of you experienced this before? Or had reason to work on the mirror lock or focuser? If so, I'd be very grateful for any suggestions. Many thanks in advance.