Jon, thanks for the bump. At this moment three sets have been sold. Two sets in the US and one set in Australia. I expect 3 more sets in the coming two weeks. Depending on sales there will be more after that.
These UCA's are designed with the same (standard) hardware that is used for the UCA's on Tacoma's and simulair pick-up trucks used in desert racing. They are very strong and have indeed more travel than a ball joint in all directions.