I am using the VP-Modpack for the 4.12 game version and my vehicles look very good.
No problems with cannons being mixed with the vehicle model.
I also have the same vehicles in the DBW-4.10 game version and they look good.
Toobone, perhaps you are using another package (?) or your files are mixed up.
Maybe you placed
your files together with other files you already had before. This is the only explanation I can think
of by looking at your model screenshots. You have 2 different models sharing the same file on how they
should look and work.
It can be a conflict with these models with another selection of models.
I am not sure how HSFX7 works, I never used it, but usually vehicle models (and static-models) can be used in all
game version from what I have understood over the years. As long as all the lines are written
properly in all ini-files, they should all be ok.
If you mix the model files with other models in the same folder, you may get problems on how they look.
Perhaps you may have a corrupt download package. This can also happen sometimes.
My suggestion would be to, erase all these vehicles and their written lines from your game
and download and install everything again.