Re:
Got an X-tools headset removal tool from Chainreaction for about £15 (at the time) – very easy to use.
Once back from the powder coaters, the inner surfaces of the head tube can look very new and clean from the processes used.
Gave a very light greasing around the ends inside and pressed the cups in by hand, plus a couple of careful taps from a decent rubber mallet with a rag between that and the cups.
With thorough research, reading and investment in the right tool before a starting job, you come to realise that most jobs that seem like only the LBS can deal with, are actually achievable by mere mortals, and possibly cost much less. Once you've done it (after a bit of cursing here and there) it's quite satisfying.
If doughnuts and favours can be exchanged for a pro's time, then happy days.