I am a bit confused.
The angle of the door swing is not set in the MVO currently as far as I know (I don’t actually use the GS library but I just had a quick look).
Why don’t you just manually set the angle of the doors in that one plan to 45°.
What ever angle you set them to is what they should be even when used in a hot-link.
Versions 6.5 to 22
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision M6800 - i7 4700MQ @ 2.40GHz, 16GB RAM, AMD FirePro M6100 (2GB), Windows 7 64bit