O ring chains were being used in the ssdt in the late 80's early 90's. I used them myself and after ssdt used it the rest of the year. It would need adjusting once or twice in all that time. You cant fit them to a gas gas pro or a beta as the chain is too wide, ossa maybe the same.
Down sides are you do lose power 5 - 10% and if the chain breaks you need a tool to re fit chain link as its a press fit. Non o ring chains have improved to the extent renthal or regina chain will last the ssdt. Bear in mind also that oring chains are harder on the sprockets.
Id buy a renthal R1 chain in your shoes.