Syncing CANJaguars with PID?

[kinganu123]

So we have 3 motors (and therefore 3 CANJaguars) hooked up to drive our elevator. Since only one encoder is needed on the output shaft, only one of the jags has the encoder hooked up to it. My question is, is it possible to use the internal position PID that the CANJaguars use and sync it up with the other 2 Jaguars, or should we just go with one external PIDController?
Also, we feel that getting the speed of the pid-enabled jag and setting it to the same as the other two will have some downsides to it, so we want to avoid that option.