[Flat Six]

Magnus, changing out the power seat switch(es) is not hard; you have most of the difficult work (seat removal and system testing) out of the way already. Couple of suggestions based on my experience:

1) replace the switch(es) with new; I've tried several times and cleaning/repairing old switches has never worked out for me (YMMV)
2) toughest part of R&R is threading the new switch's wiring through the seat frame in the side bolster; patience here is a must
3) if the surrounding trim piece is cracked (many are), now is a great time to replace it. They often crack because they're not properly seated flush against the bolster and switch faces; this is easier w/seat out IMHO
4) of course, clean & lube seat tracks and clean & condition hard to reach leather while you have the seat out
5) fully test function when powered by harness before bolting in seat (yes, I learned the hard way)
6) fully raise seat bottom F&R before bolting in -- much better clearance to access seat bolts
7) critically inspect hex sockets of seat bolts and replace any that look remotely like they're getting rounded and use a little anti-seize when replacing.

Hope this helps, and good luck

Dale