I have a zumo 220 with the original garmin kit
        
 
         You can see some pictures on this link if they do now show directly
         
         
        
http://www.tenere.dk/forumnew/forum_...ID=71856#71856
         
         Original screen and Garmin Ram Mount - i've cut it a bit shorter on the lower end so it don't touch the instruments.
         
        
 
         
         
         Higher screen and scottoiler fitted below:
         
        
 
         
         Link with better picture of the ram mount: 
        
http://www.expressmounts.com/garmin-...-assembly.html 
         
         It is also supposed to fit the 550. 
         
        
 My setup is pretty stable for tarmac and gravel but would probably not last long in a rally ....