I would like to run my servos from the ports on the BOE. I would also like to run the servos at 7.2 V and the BOE at 9 V. The jumper located between ports 13 and 14 can be used to select Vin or Vdd for the servos, but if I use 9 V and set the jumper to Vdd, you will have only 5 V going to the servos. Am I correct it in following thinking to run the servos at 7.2 V? Remove the jumper completely, supply +7.2 V to the center pin (where the jumper goes) from external supply and then connect the ground of the 7.2 V source to Vss on the BOE. Will this be OK, I do not want to burn anything out?