I had my 600D serviced at a regional FMCA rally last year. Cost me $200 cash or check, no credit card. Tech showed me the whole process as he went, knowing that I would do it myself from there on.
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 Jeep JKU Dragon Edition