David, PM Craigsub. He has extensive experience with the SMS-1, and will be glad to give you his views on the unit. He likely won't respond in this thread. He's on a self imposed, temporary, hiatus while Axiom sorts out how to handle a 24 year old problem. But' I'm sure he'll respond to a PM.

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton