The vehicle included in 75131 battle pack is not bad, but it seems unfinished to me. Although the stars in the pack are the minifigures I couldn't help adding some pieces and modding it a bit.
The main improvement is of course that now the gun can rotate. I hate when the minifgures hold the air close to a steering wheel, lever or handle so I fixed that too for both the driver and the gunner. Some tiles and slopes to smooth the surfaces and it's done.
I apologize for the bad pictures. My cellphone camera is all I have at hand.
Well, that's all about it. Nothing too complicated or innovative but now I can look at the little thing without hearing "Mod it now!" in my head. Any comment will be welcomed.
Thanks for your attention.