Current Motor Company received their first inventory shipment of batteries on Friday (as opposed to the smaller R&D orders). So, I "liberated" 20 of the 40Ah cells to see how easy it would be to upgrade my XM-3000 from SLA to LiFe.
The answer is - very easy. Packaging the 20 cells in five "4-packs" they are almost a drop in replacement for the pre-existing Greensaver batteries. They're ever so slightly wider (maybe 1/4 inch or less?) - and that's with the two end plates on. So it's a snug fit - but that's no bad thing. The 4-pack is also thinner - so there's some space that could be filled with a simple spacer. The cells are taller so I will need to cut away some of the under-seat tub - haven't done that yet. The bolt size on the LiFe is bigger than on the GS so I also had to put new lugs on the cables.
I don't have the specs on me but the bike is now significantly lighter - which helps with accel. Top speed is the same - 41mph actual (46mph indicated). Range is also better (not sure what the 1C Ah rate on the GS's were - but certainly not 40Ah). I plan on adding the CuMoCo BMS to this set up. I'll report back when I do.
If CuMoCo were to sell DIY upgrade kits for 5 x SLA to 20 x 40Ah LiFe with a per-cell BMS would folks be interested in purchasing these? Cost would likely be in the $1750 to $2000 range (that's my best guess at the moment).