I wound up ordering carbon one adapter followed by going in halves with my NYC friend to pick up a pitbull. Wound up getting it for the BikeWeek/Daytona price. As a matter of fact, just today, I applied both adapter and jack and hoisted up pretty high, and it was sturdy. Must admit, it's still spooky having that bike up that high, but the jack didn't budge....
Both carbon one adapter and if you can split the cost of a pitbull or JS jack, go for it.
My previous mistake was sending back the JS jack before getting the adapter otherwise that jack would have been just fine.
Now I have to learn how to fix, and change things. Anyone wanna swing by???