ArmaRig-IM file

As mentioned, it's experimental. So it may not perform perfectly. If I can improve on it, I will. But for now it may prove useful.

It does require the use of 4d4a5852's newest import script available on github.

Github.com

At the import menu you check the option to "import to @". To keep things a little more organised I think it's better to also check the "create action" option. Otherwise you might forget to clear any previous frames and end up with a mess.