I've just done my seals and oil as its a new bike to me and I wanted fresh oil for some trackdays.
Bottom bolt out was a pain, I had to jam a thin piece of wood against the cartridge to stop it turning.
Seals weren't leaking but the circlips were corroded bad and the dust seals were going - one of them had been cut in half to fit on and fool an MOT tester I think.
Left the bushes alone, cleaned out all the crap with paraffin and brake cleaner, I popped over my local bike shop for new seals - not the cheap shite that was in there - decent ones with double springs. Picked up a piece of mini drainpipe from Wickes to use as a driver which worked on on the oil seal but I had to use a bigger diameter pipe on the dust seal.
Put it all back together and realised I havent set the reboud adjuster right, I think you have to turn it fully then scre the assembly to the top of the cartridge and seat it then nip up the bottom locknut. So I'm having them out again this morning to do that.