Welcome to the 8000 club!
I used 3M Scotch brand double-sided foam tape to re-affix the aluminum cover to it's hinge, after I cleaned away the remnants of the original tape. Note: it is NOT easy to get the cover on perfectly on the first try! My first attempt at this failed utterly, and I had to remove the remnants of the new tape (harder to do than removing the old stuff was), then carefully placed the cover on the hinge after re-affixing new tape, and peeling off the protective plastic (note: they only put protective plastic on the top; as soon as you start to remove this tape from the roll, the underside is exposed to air, and must be handled carefully!). The cover is on there slightly askew, but close enough for me, and the lid now works as it was meant to.
As far as preventative maintenance, I would check into that capacitor kit (mine have yet to show any major problems, but it's likely only a matter of time). Also, I would inspect the underside of the main circuit board for questionable-looking solder joints, and re-seat the pin connectors near the right side of the board. In addition, if the leadscrew for the arm mechanism looks gunky, I would remove the old lubricant, and apply sewing machine oil. Finally, check the 'tachodisc' located under the sub-platter; many of the original ones were made of celluloid, and tend to disintegrate over the years. Fortunately, Dillen sells metal replacements.
Anyway, good luck with your 8000. Mine is equipped with a 'lowly' MMC20E, but still sounds outstanding. If the cartridge or stylus in yours seems to have gone bad, SoundSmith sells new replacements; also, Axel is able to retip the originals. Enjoy!
-Adam
3000 | RX 2 | RX | TX 2 | 8000 | 1800
Is there such a thing as too many Beograms?