Thanks for the hints. Will definitely try to narrow things up. Had not really thought too much about it, given that I've been able to have VI's under 1.05. Some of the "width" of power distribution is from a long section of that course with really aggressive short rollers that demand a TON of shifting to to ride steady, and some due to not having all the gears I wanted (the noted derailleur problem), but probably most of it is me. :-)
Yes, out and back course... makes it easy to set the distance.
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Yes, out and back course... makes it easy to set the distance.