Car runs well now - what's next...

[MercFan]

Say, thanks to all of you I got Hansi running pretty well now - it went from a SLUG to a rabbit in about 1 week's worth of cleaning/adjusting. I had to tweak ALDA at the end to improve acceleration from the start - it runs pretty well now.

Question is what should I work on next?! Here're kind of my plan - what you all think:

1) Diesel purge (Moly Lube)
2) New fuel filters after the purge
3) Valve job and valve gasket replacement
4) Glow plug check/replacement
5) Nozzle rebuild (Bosio) - is this DIY or pro? Not sure about 'balancing' them...
6) Patch few rust spots (under the front of the car, rear fender, underbody, few places under the hood - around battery).
7) Wastegate check - though not sure how to...
8) Transmission fluid/filter change
9) Lower pan gasket replacement

Anything else I should consider?!

Thanks,
James