I had a day off work today so made use of some tinkering time.
First job was replacing the rear inner light lens. One of the previous owners has reversed into something I think, there is some scuffing on the bumper, a very small ding in the metal quarter panel, and a crack in the rear light lens which is hard to see, harder to photograph but easy to replace.

Its not too bad, but water has got in and its going green in the cracks, and is only a matter of time before it mists up and makes the car look tatty and uncared for. I bagged a replacement unit for £16 on ebay which arrived earlier in the week. Easy enough to do, open the boot and remove the sound deadening felt

undo 3x 10mm nuts through the access holes and gently lift it out

I took the opportunity to clean the muck out of the stamped recess in the panel before reassembling it all with the new unit.

Much better.
Then onto some other jobs. The Laser 4880 oil filter tool had arrived earlier in the week too so I lifted the front end up and had another go at getting the oil filter housing to release. I followed @RoverFolkUs advice and used a 24mm socket on it, rather than fitting the cup tool direct to the 12" breaker bar. I used the Power of Grayskull and amazingly it undid - I was sure I'd trashed the cup wrench again, but astonishingly it survived. I drained the oil out of the filter housing (maybe 1/2" litre?) into a washing up bowl and then replaced the filter and o-ring, making sure I cleaned up all the threads and mating surfaces with a rag, put a tiny bit of copper grease on the mating surfaces on the not-threads side of the o-ring, then refitted it. I did it up hand tight, then a tiny bit more on the ratchet. Hopefully next time I need to undo it it will come off without a fuss.
I got given a BIN offer on a caliper and carrier so I took the lazy route and just bought it, and swapped the whole shebang. It was £150 which I could have done without, but the old one was basically fucked - I could have spent a significant amount of time heating it up, hammering it and getting it to free off, then replacing the slider and reassembling it all, but I'd probably have broken something in the process and immobilised the car so just took the easy route and assembled the whole caliper and carrier on the workbench, removed the old one and swapped the brake flexi over, refitted the pads, pins and wire retainers and then enlisted my eldest daughter to do the pedals end while I did the caliper end and bled it through.
All sorted out and working fine - so thats another issue off the list.
I think the next thing is to get some tyres, it has 4 mismatched budgets on currently, and they're all at, or close to the 3mm wear markers. it looks like I can get a full matching set of Kumho Ecsta tyres for £300, or Uniroyal Rainexperts for £340. I know and trust the uniroyals, the Kumho's are supposed to be just as good in the rain as the Uniroyals, so might be worth taking a punt on, thats something for next month though I think.
I had to go up to to the north of the UK for work last week and the Lexus handled it all beautifully. 550 miles there and back, it behaved impeccably and delivered 38mpg, and 35mpg over a combined 20 gallons of 70% motorways and 30% crawling round local roads.