Adding sub-locations for forearms, thighs and shins

[sir_pudding]

You are either bad at secrets or you are using "ulterior" in a non-standard way.

The existing rules already have results for 1-6 on 1d, and yours are missing the knee and elbow joints as well as the shoulder. Wrist and ankle are part of the extremities and shouldn't be hit on a limb hit.