how do custommodels work in game

[LJplays]

I have been trying to make a custom model, it looks fine in blockbench but when I put it on in game it is disjointed and weird. If anyone knows what im donning wrong I would love your help!

[Goodly]

You need to fix the rotation origin points.
https://github.com/NotAwesome2/MCGalaxy-CustomModels/wiki#information-part-2-pivot-points