I have 2 Regina Oro 6 spd. freewheels: a 220.127.116.11.19.21 dated '84 and a 18.104.22.168.21.23 dated '79. The '84 one has a shot body but the cogs are in good shape so I'd like to use some as replacements on the other body.
I was able to unscrew the 13 cog from one unit; I haven't gotten the other to budge, but I'm assuming I can get it off. Based on Sheldon's freewheel page, I'm expecting all the cogs to be right threaded except for the two largest (bolded above), which will be left-threaded. Does that sound correct? If that's the case, then I should be able to use any of the cogs from the 13-21, with the exception of the 19 cog, which will have the wrong threading.
Does this make sense, or have I missed something? Other than what's on Sheldon's page, are there any secrets for getting these things apart?