[suicideneil]

Hard case vs no hard case. The hard case is handy if the batteries are exposed at all, or you tend to have bad crashes that might send the lipo flying through the air if the battery straps fail- just a little extra protection, but it makes the lipo and little larger too.

With the FLM chassis, I doubt you would need the hard case verison, just use a couple good velcro staps ( along & across the lipo/ battery tray ).