A123 2S2P - change to 23T pinion gear?

[fastbaja5b]

On further consideration, perhaps 5s is the go, would I benefit reconfiguring my 2 * 2s2p packs into a pair of 5s1p (with a couple of extras) and then running the packs in parallel? I'd have to assemble them side by side, remove the battery box lids and secure with Velcro straps inside the battery box bottom.