I would not be too fretful re the Connie Gears, I have on many occasions hauled long trains, without any disastrous results, just keep it well lubricated, grease on the Gears and light oil on the moving parts and you should be OK.
Of greater concern is the awful plastics used in the tender trucks, they will eventually disintergrate, had Bachmann replace the first ones and now have fitted Accucraft trucks (Metal)./DesktopModules/NTForums/themes/mls/emoticons/crying.gif