This is the SPG with a barrel.  You'll recall that the hull was printed, horizontally split into two pieces. So the track sponsons ar...

This is another, more speculative print by Steve's boy.  It makes an SPG.  The barrel didn't print nicely, but we have PVC tube t...

This was printed for me by the son of one of my friends, who being 11, must remain anonymous.  Not Steve, he's old and crusty like me...