Hi tinleyiltom,
How many miles would you estimate that you've gone? How long is each trip that you take (on average) and what kind of terrain do you ride on?
Do you charge the SLAs immediately after stopping wherever you are or do you only recharge when you get back home?
I'm wondering why you would want a front hub motor along with the eZip? That seems overkill.
You could just change battery types for a lighter chemistry and increase your amp/hours to increase your range. Are you looking for more speed as well?
Ambrose