The only way you could use as a playable is to do it the same as the VIIC\41 is
Use the typeXXIII to replace the typeIIA using JSGME in mid 44
The typeIIA wasnt used really then anyway
But the model as is needs a lot of work to get to that stage
The model needs to be in the same form as the typeII ie seperate hull and conning tower
Then needs all the interior done
Trashing the XXI isnt really worth it IMHO
Certainly do able but AI will do for me