Nice!! I am guessing you have a gear? Your going to really like how that tractor handles a BB (box blade). Did you by chance get a BB with a tailgate? I lucked into a heavy 6' BB with a tailgate at a farm auction. It cuts really well.
You may already know all this but I have learned to use my draft control with the BB. Using the draft control helps keep from digging too deep and stopping the tractor, especially with the rippers down.
Good luck and keep us posted on how you like it!!