My son just got his general, KD9IWX, and bought an Icom 7300. Reading various threads about this rig it seems it will run FSK RTTY via a USB cable as long as EXTFSK is used in software. I recall some concerns about EXTFSK and RTTY timing; does anyone have experience with the 7300 and this setup and the quality of the signal? Any input appreciated. Chuck, N8CL