
(.. well, ofcourse, when your priorities are finished, that is)
IMO, this would be something I'd really frickin' enjoy riding in. Towable mobile 88mm flak.
So much fun use I see in this thing.
When preparing for an imminent enemy horde offensive... you can take one out, drive to the woods nearby and hide them. Whenever those pesky low-alt buffs come around, you can let 'er rip!
Or, when you anticipate an enemy tank column approaching, you can drag these out with your friends, set a defensive perimeter of 88mms loaded with AP shells.
This baby would be so cool.
A powerful, mobile AA/AT platform which the field attackers MUST search out and destroy... instead of those eak-o stationary ack that vaporizes the moment one lands a 20mm round nearby it.
To solve the problem of it being a virtually indestructible defense mechanism, you can limit their shells to only AA/HE or only AT/AP, never both.
(ie. drag the 88mm out, shoot at enemy buffs.. when the multiple ground attackers target you, enter the forest canopy... and when tanks approach you, switch to AP shells and kill them from 4.0 out... etc etc..)
Maybe you can also fit them with their own targetting system that is not so easy-mode as the 5" point-and-fire..
But integrating one of these, player manned, mobile 88mms will make both the ground warfare, and air warfare so much interesting. They could even serve as an artillery by fitting something like a 'general purpose' HE, that is only good for buildings, but not good for AT or AA purposes.