Well I got the thumbscrew today and it works GREAT! Although it's "less security" than the Zumo security screwdriver it really does not make a difference since I take the unit off everytime I stop and park. Worth the money.
Mark
Mark,
Glad you like it and it's working out. The Garmin hype about that being a "Security Screw/Screwdriver" is just that hype.... Anyone can purchase those screwdrivers from Garmin (not a requirement you show proof of ownership of a Garmin 450/500/550 to get them), and all the screw/screwdriver combinations are the same. The only "Security" it offers is the same as the thumbscrew offers... it just keeps the Zumo secure in the mount in case the latch were to pop open while going down the road and it is not an anti-theft security device. Plus the thumbscrew makes it a lot easier to get the unit off and stored properly then having to fool w/that screwdriver.
![pumpkin :pumpkin:](http://www.cvoharley.com/smf/Smileys/CVO/pumpkin.gif)
Ride Safe,
Fired00d
![fireman :fireman:](http://www.cvoharley.com/smf/Smileys/CVO/fireman.gif)