Problem with viewmodel hands from left for dead port

[ssloe]

I'm still trying to convert a l4d2 model to a gmod playermodel, I've finished most of it and I've moved on to the view hands, it seems normal but when it gets animations the thumbs end up being inverted, I've looked at the model and other models viewmodel hands closely I can't seem to figure out why this happens and how to fix it.

Here's a picture of what happens. Notice that there's twisting and the nails aren't on the right side (only for the thumb)

https://files.facepunch.com/forum/upload/244015/e9425cba-3089-444b-98c1-47629461bd25/20180329015113_1.jpg

[TFA]

The thumbs on the l4d2 biped are twisted 180 degrees on the roll axis. Fix that in your preferred 3d software and you'll be golden.

[ssloe]

How exactly would i be able to fix it in blender, should i edit/rotate the bones? or is there another method of doing so. I've tried rotating the finger0 bone but it just messes it up.

[Gmod4phun]

If you still did not fix the issue, you can do it by going into Edit Mode, selecting the Finger0, Finger01 and Finger02 bones, set the selection origin to Individual Origins, change rotation mode from Global to Local, and rotate the bones 180 degrees on their local X axis.