[Elecraft] Slowed RS-232 with P3 installed

[W4CCS]

Has anyone noticed how the reaction time between the K3 and HRD has 
slowed considerably since installing the P3..??

The commands were instantaneous before and now the K3 takes 2 to 3 
seconds to react to any band change or other commands from HRD.

I have several things that use the RS-232 port:

1 - Microham Keyer II
2 - Microham Station Master
3 - P3
4 - Palstar Auto-Tuner (In listen mode)

W4CCS