Current Projects chat and miscellany

So crank length does make a difference, but only to what cadence is comfortably maintained, but not to actual power output?
Do longer cranks mean that hills are easier as more leverage, a bit like engines having higher torque level don't struggle so much up a hill, but won't necessarily have a higher power output (HP)?
i.e. - longer cranks = diesel land rover, short cranks = nippy hatch back? Or, the rider still has same power output, but crank length allows it to be used in different ways.
Or do other factors apply, optimal cadence for set ratio, or is it more that each person finds what works for them?

Surely the 'leverage' issue is just the gear ratio, which crank length contributes a bit to, but much less than chainring and cog size. So for the same chainring and cog size, longer cranks will be a slightly higher gear than shorter cranks. If you adjust for this with chainring and cog size, then crank length becomes irrelevant to 'leverage' - and (assuming tester is right about it not making any difference to human power output) the only thing it will make any difference to is comfortable cadence.