I am reading some Ruud literature and they say that if the linesets are sized properly and in good shape you can MAYBE clean them out thoroughly and re-use then in a replacement R410a system. Completely incompatible lubricants and they seem to be saying "lots o luck Charlie!" between the lines. In this particular thing I am reading they don't discuss exactly how that might be done...
Anyone tried this? How? And what were the results?

I can just imagine the screaming coming up from the homeowners if you have to bust up their finished palaces to run new linesets for the R410a systems in the coming years.