Allan,
You and I might need to stick with the "Tin Cans and string".......Just kidding, I hear alot of good things about Garmin but know much of nothing. ..

Hi Allan--I suggest you call Howard Owen. He set me up with the system and seemed very competent with it---I'm out in Calgary for a couple more days--Will call when i get home.

Allen the best way to put it is with birds eye u are looking at google earth map with trees, fields, creeks, etc but with plain topo it is just rds.hope this helps

I sent you an email with various pictures and setups on the 220 and 320. Hope it helps.