The M21 looks great. Should the mortar ready-round be nose up? It would seem to be counterproductive. For the driver, I would recommend getting very upset trying to fit him in. Place him on a hard, sturdy surface. And, smash him with a hammer! He may no longer be useful, but you would feel better.

As a gunner you would want the asst. gunner to hand the you the round nose up. That way you see the fuse, and can index the tail in the tube quicker, You look at the charge as you raise the round for insertion as well. If the round is handed off nose down, the gunner can see the charge but has to turn the round around to inspect the fuse and fire the weapon. These are unnecessary steps created by handing the round off nose down. It also, and more importantly increases the chances of fumbling and dropping the round. It wont go off but creates unnecessary confusion in an already tense scene.

G