Thank you Jabian. The AVX is standard (low end basic mount) but I've been very happy with it. I tried several dolly options because I'm not into work... setup carrying out - connecting etc.
I can be rolled out and shooting in about 5 minutes and if clouds come in I can be rolled back into the garage in 2 minutes.
I tried several cheap dolly options and failed. Mostly due to not rolling in grass or taking bumps well. So I went to this. It's a Bogen tripod dolly. They are 400. (ouch) but they had two
open box units for 200 each. I bought one and shared the find and the other sold fast. I kinda wished I had bought them both for that.