Well, I did this capacitor and all seems well so far. I have tried to overheat the ECU on a trip on thursday afternoon and it didn't shut down on me - plus when I shut the engine off it restarted perfectly, which it didn't do before. Fingers crossed. Apparently the faulty capacitors also cause a loss of power and whilst the Jeep seemes to pull better from lower revs, my guess is that I am just experiencing a placebo effect.
I have done a couple of other jobs - no pictures yet.
One was to (finally) fit the polyurethane spring bushes to the rear leaf springs. This involves drilling out the old rubber bushes as well as removing the metal sleeves in which they sit. Lots of drilling, lots of noise, lots of chiseling out the sleeves but job now done. It was just as well really because the old rubber bushes were crumbling away and this was giving the rear end a wayward feel. It feels more taut now, but also more bouncy.
I had to have the steering box rebuilt last week because it had a lot of play in it and was leaking quite badly - as was the pump, it transpired. I had the job done by a trusted local garage and asked them to investigate a back end noise which turned out to be a knackered rear wheel bearing, so I had that replaced at the same time. These are some of the few jobs that I don't feel comfortable doing so I am happy to farm them out.
Something that I DID do for myself was fix the faulty electrically powered seat base on the front passenger seat. Actually, I didn't fix it, I just replaced it with a manual one

- I bought a pair of wrong coloured seats from a scrapyard (beige instead of my grey) and swapped the base over. Whilst at it, I took a look at the driver's seat and was glad I did because I found no fewer than 4 significant cracks in the frame, a common problem on Jeeps of this era. A few minutes with my "stick" welder and all is well.
I still have the beige front seats and because they are a kind of heavy duty cotton weave material (which looks a bit like tweed) I am considering fitting them to my Grand Cherokee in place of the nylon covered ones in there at the moment. They'll need a damned good cleanup, though!
Out in the desert with a 1998 Grand Cherokee V8 and 1996 Grand Cherokee 4L. Back home: 1969 MGC GT