Yesterday at work I was talking with one of our vendors who deals with chains,bearings,seals etc and asked about roller o-ring chains.I want to do a stretch on my buse but dont like the chain the kit comes with.He has diamond chain made in the USA and says its very strong.He schooled me a bit on chains.The roller chains are prelubed from the factory internally and that for 500 miles or so should never be rode hard so the chain can break in and keep the lube behind the o-rings in.He said if you romp on it too soon, the lube with fling out and the chain will de-grade from there.So basically, we lube the outter chain for the external surfaces.He also says to just wipe the chain off with a rag and not to use any solvents unless its compatable with the internal lube.Also says not to mix chain lubes which makes sense.I havent gotten the quote on the chain yet but he says its spendy.Hopefull I get a discount thru work.