(ET) Tiller shields?

["Elie, Larry (L.D.)" <lelie ford com>]

My tiller is working well.  I never had a manual, and so I'm not sure if I 
have 'all' of it or not.  There are a number of 5/16" square punched holes 
around the top of the sheet metal.  I assume they are for shields.  It 
isn't obvious from the small picture I got off the net.  Many other brands 
of tillers have a spring-loaded back shield, and side shields as well.  
Can anyone confirm or deny that there were either standard or optional 
shields for the tiller before I set out to make some?  Or are they for 
something else?  Or were there any other add-ons to the tiller?  Also, the 
round 'tool-bar' that the tiller mounts to can be installed 'high' or 
'low'.  I have tried both, but other than for ground clearance to the bar 
I can't see much difference, any comments?  Finally, the back spring 
doesn't seem to get much action; why is it there?

Larry Elie