Operator: Constraint Chain to Chain
Operator for constraining each bone in a chain to the corresponding bone in another chain.
Perhaps the single most important feature for ChainTools, and the most difficult in terms of the amount of boilerplate I have to write... plus lots of UI code and an annoying number of sub-operators. I might even have to make the operator the user has access to a modal, for the menu to close as soon as an option is chosen. I hope I can find another way that doesn't involve too much UI programming though.