Here is the system that my newly acquired 2019 Carbon Express F-Force 390 Pile Driver uses. It plugs into a + near the top butt end of the stock. One can stop cranking anywhere. Once the crossbow is cocked, press the button forward to the uncocked position and turn the crank a turn backwards which relieves the pressure to remove the hooks. The hooks are installed facing down. There is no way these hooks will jump the rail-stock (barrel). When installing the hooks on the bowstring, they are set tight to the rail-stock. The crank can be used on either side. Once the crossbow is cocked and the hooks removed, just remove this system from where it plugs into the butt end of the stock. On this cross bow, this system pulls straight back like a rope cocker.
This system is far superior to any design Barnett has. If one can build an adapter, this is the system to use.
I have Barnett's system on 4 Barnett crossbows: 2 each Ghost 410, a Barnett Buck Commander BCXtreme 365 Ultra Lite and a 2018 Barnett Droptine STR. The couple of days I had the Barnett Whitetail Hunter Pro STR, I had Barnett's Crank Cocking Device on it. These are identical systems that will work on either of the mentioned Barnett crossbows and they all pull downward and get worse the closer to the fully cocked position, but not as steep as the one mentioned for the TS370, TS390 Barnett crossbows. The reason being the TS370 and TS390 have a different stock design so the crank system can not be mounted higher in the stock like the above mentioned Barnett crossbows.
Barnett's crank cocking device has two separate strings that the knots on the spools must match and the spools have a large pin so they only fit one way.
The Carbon Express uses one string only fed through the crank system, so it automatically pulls even and winds even.
All the best.