Im not THAT much of a masocist (sp?)! I'll cheerfully wait until the evaporator goes before I spend a week replacing it!
I can live with the poor cooling at idle, no different than any other car I've ever had with AC, none of them cool well sitting in traffic.
I ran a vac of 30" for an couple hours while changing a tie rod end, so I didn't bother with changing the R/D -- I'm fairly certain the water is mostly gone from the desicant with that vac (really more like 100 mTorr -- it's a "real" vac pump from work).
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!