Many thanks for all the helpful advice.
I found the ADP-RR conversion chart in the archives and will add MSR=2081 and SDL=2109?
Thanks in large part to the helpful folks on here, I now would not turn down a dealer based on R&R - I might have before!
Another observation (and again, I hope I am wrong) is that when selling parts from a quote in R&R there is no way to skip items the customer did not approve without deleting them from the quote first? In ADP, one can tag only the items sold in a repair order, but not in a counter invoice unless they are not on file.