I wouldn't even think about spending the money for hydraulics unless you're going to use it all the time (commercially) or literally have enough land that you'd use it all the time. WHile handy, it's not THAT big a deal to get off the tractor and spin the top link adjuster by hand. Play with the lift arms, if you get just the right amount of load off (implement touching the ground but not sitting totally) you can move it freely without the load on it.
For boxblading: forget about setting the float at the highest mark, running around the ground shaving a little here and a little there until it's all flat." (like they will tell you /forums/images/graemlins/smile.gif Doesn't work! Every little dip or bump raises the front wheels first, (tipping the back downward) and making a larger digout in front of the bump! Next time around it's WORSE than it was before! /forums/images/graemlins/shocked.gif (Maybe my draft doesn't function well or something - 2001 TC33D)
What you've got to do is develop "the eye" to see the high spots in the area to be worked. Go to those spots and dig and drag soil away from those spots and to the low spots. Raise the box and dump more than needed on the visibly low spots, you'll move some out in repeated leveling passes later. So first thing, you eliminate the UPS and DOWNS of the tractor and implement. Once you've shaved the high spots down and filled the obvious low spots, the tractor should run fairly smoothly around the area, without dipping significantly on any part. THEN you can set the draft to the highest mark, run around, and around, and around until you aren't moving anything anymore and then lower the draft a mark and repeat. At the higher positions there will be parts of the soil area being worked that aren't getting worked at all. Keep dropping one mark at a time until you've worked over all the areas. Hope that makes sense.
It is tricky to get it nicely smooth with a box /forums/images/graemlins/blush.gif