Thanks Team.
First up, Jeff, a rough look at the Halftrack Mortar base option.
Quite doable, but a few things other than the ammo being too small were not right for me such as it would block access to the Cab.
http://Added in a rotatable front mount. Even added a foot pedal to lock in place
I see the mortar as demountable as well so that it can be moved in land with the troops as required. The mounting platform will also have lifting eyes so it too, can be removed if required.
Revised Ammo Stowage layout to offer less obstacle to the side MG positions. Still tossing the .50 vs .30. But the .50 do look chunkier.
As this is an "On the Beach" vehicle, I am now looking at raised armour superstructure to give some crew protection to snipers. Probably fold down for when not required
Almost there really. Now only the paintshop mojo to work on