I think that's probably fair - losing boat speed just once through lack of attention whilst trying to adjust something probably cancels out the benefits of constantly tweaking it.

At the last race in Mumbles my arms were killing me (I know, need to get to the gym...) so I just left the main cleated and made use of the 12:1 on the downhaul (and a bit more luffing in the puffs). Worked pretty well.

Paul