Nice work! Yeah, Lithium Polymer batteries do have some downsides -- explosion/fire hazard being top of the list, and that goes double for custom-assembled battery packs and chargers that aren't matched to the pack. If the battery is built by someone with the right knowlege and skill, it's no more hazardous than that cell phone we all carry (which, yes, do blow up on rare occasions) -- but if it was built by Bubba, who has four different size tires on his truck and balances out the handling by hanging his head and left elbow out the window, even in the dead of winter, I'll pass, thanks just the same.