I had initially worried about the posi-lok and the umbrella joint for weight concerns. I have an active-style setup, but others who clamp on may not, but two things occurred to me;
1) How often would I use this and have a lot of people clamping? Unlikely. Best I could think of is at a venue where we have a great place to setup, but not a lot of floor space (so running a stand with the legs in bungied to a support beam type setup is somewhat attractive) and I wouldn't be using the joint in that configuration so it was moot.
2) Once you get the pole upright, you are dealing with just weight, where as if you were going out to the side you would have weight plus force, and at that point, I'd probably use my adjustable arm over the pole (part #
396-AB-3).
I appreciate the suggestions folks!