SOME PEOPLE would look at that last statement and say ' well, that means what you have saved so far should be available for the tools you really need to do this right '.....
There is Cheap..which I am ALL FOR... and then there is ' below minimum ability to be effective '.... which almost always costs more in the long run... sometimes a LOT MORE..

__________________
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/showthread.php?t=156207&highlight=evaporator

A/C thread

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