A friend of mine is running his K3 with an ExpertK1 PA, controlled by RS232. Now he wants to add a P3 to the line. I assume, some of you guys are using this combo. How did you realize controlling? Do you use Band Data ports on K3-ACC / Expert CAT, or is it possible to control all 3 by RS232? Any help welcome. 73 de Peter, DL2FI