Ive always used the FS1 but the Xtra seems popular .....but a different method of setting the failsafe position.

http://www.google.co.uk/search?hl=en&q=fs1+failsafe&meta=cr%3DcountryUK%7C countryGBhttp://www.google.co.uk/search?hl=en...UK%7CcountryGB

http://www.google.co.uk/search?hl=en&q=xtra+failsafe&meta=cr%3DcountryUK%7 CcountryGBhttp://www.google.co.uk/search?hl=en...ntryUK%7Ccount ryGB

(Message edited by woody on June 30, 2007)