Talking about the F75 , I bought one of the first when they came out , I already had a SD2100 I got new in 1996 & an older Whites Goldmaster .
Well I read the manual & from the first hunt with the F75 I hated the thing ! far to chatty with an overload of information that slowed me to a crawl , got rid of it soon after , maybe they improved it & ironed out the bugs these days .
Shame Tesoro stopped selling their Diablo Umax ' great feather weight easy to use performer , there's one on Ebay at the moment .
Wish Steve had tested one of these , don't think he ever got the chance .
Jack .