(ET) E12M deck height

[Steve Gaarder <gaarder ecovillage ithaca ny us>]

I just got an E12M and one thing I notice is that the deck does not raise 
very high.  In the highest position of the lever there is still plenty of 
space between the deck and the tractor floor.  Except in this position the 
deck is resting on its rollers.  I also notice that the adjustable 
diagonal rods are all adjusted to their shortest length.  Is there 
something I can change to allow me to have a greater range of heights?

thanks,

Steve Gaarder