Just an idea, but remove the debri trails for when its on the ground.
It dosent look to good,but you should also add an emmiter trail out of the two exhaust ports like the mini jet and firebird.
Edit:Fire flys cool dont see how were gonna get flying zombie AI though. Flying bots sounds hard.
Actually that's kinda what I'm doing, except I'm changing the dirt to look more like dust. It'll look like the Fighter is kicking up dust. And I will add flames for the turbo jets, but that will be for a later version. ;)
Glad you like the Firefly, I'm not too sure how we're going to make flying bugs, but I bet Rot or Space Guy will help us. :P
Edit: oh ya, I just fixed the problem. :D
It's almost ready to go now.