I have a great K3 with a RigExpert TI-5. The TI-5 uses the RS-232 serial port on the K3. I would like to purchase a P3 and see that it also needs to use the RS-232 port on the K3. Is anyone else running the K3/RigExpert TI-5/P3 combination using some type of "Y" cable for the RS-232 port? Thanks. Larry, KN8N