WInter came back with some snow yesterday and highs in the 30's so it was another indoor session. Did five 2/2/1 efforts at tempo/steady state/tt pace. Held 280+, 330+ and 360+ on all. Had to replace he hub batteries on the Indoor 400. That wasn't as much an issue as having to pair and activate every sensor from the Power to RU to cadence etc. Also had to re-boot it several times. I hope these batteries last as long as the first pair.