Jack,
Sorry to hear you're having stumbling issues with your 342. But, sounds very similar to what I experienced. If possible, give me a call at 217-935-5972 and we can discuss the steps I took to correct the issue. If calling is not feasible you can e-mail me at:
hendry@mchsi.com. I'm usually home after 5 PM (central time).
Harold Hendry (Sailfish)