I am providing pictures of several different angles of the electronics harness so that they can be on file for you in the future should a problem develop, ....so you and / or your guitar tech can take a look inside at some factors to plan for before opening the guitar up:
These electronics are remarkably high quality design and work. The switch wires are run through a grounded metal flex tube shielding ! ....and the pickup leads are shielded Belden cable. The capcitors are high quality for this application. The wire routing is expert, aligned and tight; No loose / wild / chaotic wiring here !
When these very small pots first came on the guitar scene, many guitarists thought they were "cheap japanese crap"; But actually, the space saving design came from NASA's space program. Although they were / are not of mil-spec quality, they worked well and still do. BUT, because their knob shafts are VERY small, care must be given to ensure that the knobs are gently pushed all the way down in contact with the pickguard, ....which will help prevent any strain against those small shafts.
The switches are tight and show no signs of any substantial wear, looseness, etc. Care must be given to lubricate the switches every year or so, with a high quality spray lubricant / cleaner such as CaiLube. The switches assembly is plastic and not of Switchcraft quality, but should serve well if cared for. Plastic does degrade over time, although the plastics on this guitar appear to be in excellent condition ....except where noted in these webpages.
Polishing and replenishing plastics and finishes with oil REQUIRES excess oil be wiped off. THEREFORE YOU MUST REMOVE THIS PICKGUARD TO SPRAY CLEAN / LUBE THE POTS, SWITCHES AND JACK. A PERSON SHOULD NOT TRY TO LUBRICATE THE SWITCHES AND POTS ON HARMONY SILHOUETTES THROUGH THEIR TOP PARTS CLEARANCE GAPS WHEN THE PICKGUARD IS INSTALLED. THE EXCESS OIL WILL RUN DOWN UNDER THE PICKGUARD THAT IS MOUNTED FLUSH AGAINST THE FINISH, WILL BE TRAPPED THERE FOR A LONG TIME IN TOO LARGE A QUANTITY, WILL RUND DOWN INTO SCREW HOLES AND TURN THE WOOD THEREIN TO MUSH, AND LIKELY DAMAGE THE PLASTICS AND FINISH BY STANDING TRAPPED IN TOO MUCH OF A QUANTITY.
Notice that, except for the bolted-on pots, ....everything else in the electronics harness is riveted to the pickguard. So if any future work is needed, planning for an expert rivets removal and re-riveting should be planned for if this guitar's fine original condition is desired to be preserved. Reputable computer repair shops should have the ability to work with rivets. An airplane repair shop would also have expert experience with the nature of both rivets and of delicate parts maintenance.
I have vacuumed the wiring harness of some old small spider webs, and cleaned the pickguard, and wiped it and the switch housing with LUB-E to replenish it's oils