Go look at this 101 How-To videos.. It will help on the 401 gyro.. For Guides and reference material.. All of this comes from Finless Bob's Helifreak Tech Room... Go look at all of Finless Bob's videos ..
http://www.helifreak.com/forumdisplay.php?f=60
401, 101 Help
http://video.helifreak.com/?subpath=...gyro_setup.wmv