Inaki - in theory you could use an approach of attaching two Lines to one common Point, and making that Point attached to a fixed Body, to get the loads summed from the Point object. This would be a workaround for the limitation Ryan is describing I think.
Ryan - do you know if this limitation is in both C and F versions, and any idea when/why it was introduced? I’m fairly certain I originally made things so you could query anchor points to get the anchor loads (the ground Body’s dRHS would be called, which would have any fixed points calculate their net loads). In any case I’m thinking we should restore this functionality if it was lost at some point… Summing these loads is very light computationally.