Aluminium Battery Boxes

due to not on stock parts in steel, i decided to build a battery box set in aluminium.
so no standard steel welding (MIG), no, it is an aluminium welding process (WIG), which is much more difficult than steel welding.

here is the result; battery box one almost ready. welded and grinded, only minor gaps have to be filled and a light media blast and primer painting is necessary: