Sometimes you need to walk away and come back with a fresh head. Don't give up and don't give into Internet "experts" either. When you have a sump-less compressor, the "clocking" isn't that important. Having the correct charge of oil in the system is. The R4 isn't a great design to begin with. You already have it installed, run it until it craters. When it does, clean out the condenser and replace the filter/dryer and go again having learned a bit more (including whether or not your system leaks).

If the bearings were starving for oil, I'd expect you to already have problems. Since you aren't having issues with the compressor, leave sleeping dogs lie.

Set the fan to Max, open all the doors, set the temp wheel to Max-Cold and check your pressures and report back. How was the R134a charged originally? By weight or by pressure? If by weight, how much % of the original R12 charge was added?

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)