Set Hinge point in B3d ?

Can i set the hinge point of a model in b3d or only in the modeller ?
I have a lot of models that have the hing points wrong and loading them in the modeller is much work.

I tried FITMESH and it seems to work for Rotation etc but Linepick still have strange results.

Post some code. I don't see why LinePick would give strange results.

It should work with poly picking but won't with box/sphere picking as those are oriented around the mesh origin.

What's a hinge point? Is that just the mesh origin?