Your comments

http://imgur.com/a/fWNTU

Sometimes the models work fine (like Unity's capsules are fine, as are their cylinders), but when some custom meshes get scaled, either by a parent node or the actual geometry's game object, their vertex offsets get scaled as well.

Basically the renderer's blue outlines is where the vertices are supposed to be. The last image shows a capsule compared to a model, the collider's green outline is where it would be with no offset, blue is where it should be with offset, and the model way down there is the scaled guy.

Elegant solution! I should've looked into it more before complaining ;)

This would be excellent, I want to be able to control everything through nodes, I prefer a procedural set up from a manually-entered one.