IMO, #25 chain is great for mechanisms but unless you know what you're doing it's a pain for drive systems. Some teams can make it work, but most underestimate the level of difficulty to get it right. Essentially #35 chain has the benefit of added tolerance for mistakes, so as others have rightly pointed out, the quick fix for #25 chain acting up, is to just use #35 chain.
That said, issues with chains breaking, skipping, and maintenance are the main reason we no longer use chains on our drive system. Geardrive ftw.
