(every hundred metres the pilot has to climb out and clean the blaster barrels). Okay I am only guessing the guns are under the cockpit.
Yep. The two guns from the usual TIE fighter, with an extra one mounted on the bottom of the ball. Took a front-on shot of the century tank sitting on a large GW base to match the trooper's base.

I just read that the lower blaster was retractable. I'm sure cleaning out that compartment was fun for some lowly technician. The only advantages I can see to this thing is the one-man design. They were mass-produced and cheap to make, using recycled parts and designs. That's got to be a comfort to the pilot/gunner.
Yep, now I need to paint up the other two I have. I just got an idea for a game.