I dunno, Guaire. It seems like everything's still well on topic. No sign of Grete...I think we're OK for now...
Thanks for the off topic waste.
The O X rings need a different maintenance procedure. Remember they are sealed.
First you use a chain cleaner. Spray on, wipe off. Next, you spray on Chain Wax. This coats the plates, pins, rollers and seals the rings. If you do this, sloppy wet weather won't affect your lube seal.
The traditional roller chain is different. It's easier to maintain well, off the bike. Clean it in a can, pan, whatever, with kerosene or something there about. Brush it to clean off the outer parts.
The old lube formula was a mix of paraffin and oil. Warm it and let the chain soak in it. This mix penetrates to the pins in the rollers. The chain is lubed and ready to install.
Or:
Off the bike, spray it with chain cleaner. Wipe clean. Let it dry. Spray on Chain Lube (not Chain Wax). Now the chain is lubed.
Differences: you don't want the same cleaning or you will strip the lube from the O X rings. Bad idea.
The ringed chains just need the outside cleaned and a coating of 'wax' product to keep them sealed.
Size, weight, cost and type of maintenance are good considerations for comparisons.
Why I run a roller chain - Either one can work, but, Bullets are light weight bikes, why add weight? You will be riding with a good chain if you maintain it. When setting up a new roller chain, it will some stretching, fairly soon. Then the rate of stretch decreases, so you don't have to adjust chain slack so often.