Originally Posted by
njkayaker
I did get that your rule is not to cross the two end sprockets (not unreasonable).
I'm looking for the general rules (ideally, with some support) that people advise. "Occasionally" indicates an exception to the general rule. It seems obvious that occasionally cross chaining isn't likely to cause the world to end.
This isn't going in a useful direction. It's seems more reasonable that problematic setups are avoided by manufactures because it's easier and more reliable for people rather than "litigation" issues. I'd say it's more reasonable to let experts to choose problematic setups rather than foist them on everybody.
Anyway, cross chaining that doesn't work isn't relevant since you can't use it. It's the advice about cross chaining that does "work" that is relevant. The general reason to avoid cross chaining that "works" is to reduce wear on components (not that it doesn't "work").
Well... it certainly looks as if you know exactly what the deal is... no matter what input you get from others. Why did you even bother asking for advice?