Originally Posted by dauphin
Without getting too technical and with a couple of easy to understand
examples, could someone "splain" it to me again?
Don't use the big chain ring and big cog, nor the little chain ring and little cog. Look at the chain, it looks bent as it come off each ring/cog.
Check out the next cog up and down, see if it looks bent. If the chain seems to have a noticeable angle, even though it is obtuse, you are cross chained.