After FD was done using the Red Truck, he left it parked at 80 Mountain Springs and Walked 40 minutes home according to his phone pings.
Why would FD leave it parked at 80 MS and Walk 40 minutes home if the trade could have been completed at 4JC?
FD wanted employee to think that FD had Not driven the truck that Friday and therefore had to leave the red truck exactly where the employee last saw the red truck parked.
FD's phone pings prove his Walking home from 80 MS and also when the employee returned from NC and picked up FD at 4JC, the phone pings prove they went directly to 80 MS, for the switch.