3200 Lipo will be more powerful than your 4100 cells, and more duration too considering you are charging your cells the evening before. Remember cells self discharge and have losses due to getting hot through a race, and Lipo does not, only gets mildly warm during a race.
If your having 2 packs, and only doing 2 runs on each to then recharge at home - using a Lipo cutoff GTB, you should be fine I reckon, especially considering you can do it with 4100 cells. Id be tempted to recharge them sooner after this, then leave them charged for a week until the next meeting you attend.... rather than leave them again until the evening before the next meeting, as they may be borderline flat.
Chris
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