the quick fix for the tricky sponson bottoms is after you fitt the tracks, glue the hull bottoms to the lower hull and then attach the upper hull, i did it this way on all three of my dml panthers and it work great. the ball turret on the late a, has i seem across the top, but it went away with sanding only, no filler. squadron/ signal's panther in action has a couple picsa of late a without zimmeritt, but thet wer in italy and southern france, so i would assume that they may have been at normandy, but i doubt it. if you do decide to add zimmerit to your A, i wouldn't worry about the seem on the ball turret. good hunting stug