Ork mega Tank

Hello all,
I was so engrossed on finishing the ork army I completely forgot about this but here are the work in progress pics.

here are all the armour pieces all layed out. Rivets have been done already as they're easier to do on when the parts are flat.

Basic block of wood with 1st layer of card stuck to it

Main turret + gun, front firing big gun & 2 hy mg turrets

Rear access hatch