rngdmn wrote:
I would like to be able to quickly change my gimbal head (for DSLR with long lens) from my tripod, to a window mount, to a monopod. What do I need to do that quickly, yet securely?
ProMediaGear makes a GT1 Tomahawk--it is a gimbal arm with an ARCA-compatible base. You would have to have an ARCA-type clamp on each of your tripod, monopod, and window mount, but it should do the trick. I think there are a couple of others that make something similar, but I remembered this one from my search for a gimbal.