First, that tab on your 1083S (I'd never even heard of that model before) I have that issue on two of my monitors. I tried the glue approach so many times... it simply never lasts.
My ultimate fix? I used a precision drill (I know I know) on that piece of the monitor casing and used a white nylon nut and bolt that presses through the hole and into the tray piece. You don't even notice it unless I point it out and it works flawlessly. It's the only way I've ever been able to repair that issue and not have it fall apart on me days later. That hinge, as simple as it is, can't take the pressure of the close-latch mechanism and the required perfect alignment of the pin with just glue. I even used a special compound to try and melt the plastics together. Didn't help as the surface area is just so small.
Anyhoo... looks like this:
- Maybe once a year I'll use a fingernail to re-tighten the little bolt and nut.
Very functional and camouflages itself into the background.
As for caps, you're right. The A1K very rarely ever needs a recap. Neither do the 500, 2000 or 3000. It's all the others that are ticking time bombs. I think with the 3000 the weakest link, besides the placement of the varta battery, is its PSU from what I've been told.
To that end I've never had an A1K PSU go out on me. Well, since they are over 35 years old now I do have a couple where the internal fan grease is obviously hardened, so the fan will produce a clunking noise.
For your floppy drive issue, that's a really tough one. I had a very similar situation with my Amiga Phoenix machine. The positioning and tolerance of the drive has to be absolutely perfect for the disk to be read. Yours is entirely stock with all of the shielding and supports in place, so that's a real head scratcher.
With my current Rejuvenator machine that is my daily driver, it doesn't even have the shielding installed. The top of the plastic case bends ever so slightly under the weight of the 1080 above. You can see it most noticeably around the power switch, where the plastic doesn't match perfectly as a result of the bending.
But it's so slight I don't worry about it. And I've never had an issue with the floppy drive.
Are all of the screws that go below the A1K's case installed entirely? (they can strip very easily, btw)