Thanks Bish and Greg. The info on the Kugelblitz is timely. I started it last night. Here's the fun bit.
It was really just a case of tidying up the resin which was pretty OK, opening out the turret hole a little and mounting the ball turret.
I don't think the 3cm Flak 103/38 guns are available as turned barrels in this scale. Verlinden give a length of plastic tub, but its not rigis enough, so I might use microtube, then hollow out the resin Verlinden muzzles.
I just depress a tiny screw driver into some softened Tamiya putty to make the zimmerit pattern. The AFV Club Sturmtiger kit that I built a couple of years ago had a little photoetched zimmerit rake, but it was still overscale for 1/48 so I don't use it.
Cheers
Tony