You did a lot of stuff to your system yourself..... If you only have a leak.... you might get by with just fixing that... thus the nitrogen r22 combo to check in case it is in your evaporator... (the leak)....so a sniffer will detect it...

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

Upate to what I think is now fixed. Took the car to an AC specialist that had a sniffer and could put the AC under pressure (not sure they used Nitrogen or not.) They found a leak in the high pressure hose around the fittings. Replaced the hose and refilled the system and now its working great. If the system stays charged for a few months in the spring, I am going to assume my problems are gone. I will report back then.

Turn your AC on at least once per month to keep the front shaft seal lubed...

__________________
1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html