Very nice again, Ari!
I like how the circle side shift cylinders fits neatly even at full lift!
I notice a bit of slack when you lift the grader up, but that is admittedly a rather extreme manoeuvre!
What is the maximum clearance between the blade and the ground which you get?
Original has:
Maximum lift above ground 16.5 in
Maximum depth of cut 17.3 in
http://www.cat.com/cda/layout?m=308648&x=7
In 1:14.5 that would be 28mm and 30mm.
Cheers
Jens