Yeah, what you saw was the
HydrauLink I'd guess... There's a huge thread somewhere on TBN about this piece of equipment. I really don't want to start another "war" on this, but I've got one and I wouldn't trade it for anything!
First, let me say, the HydrauLink
IS NOT a Top-n-Tilt device. It does not allow for true hydraulic control of your attachment. You can adjust your attachment on the fly, but only in the "down" direction, because Mr Gravity is on your side...
What it really is is a no-muss-no-fuss fully adjustable toplink. Yes, most toplinks are adjustable, but with the screw types you adjust, test, adjust, test, adjust and then use. Most of the adjustment is done with the implement just touching the ground or barely off the ground, with you off the tractor doing the adjustment. If you load up your implement with ground contact, you can barely budge the screw adjustment because of the load on it.
With a HydrauLink, all that goes out the window... For instance, if I've got my Grading Plane on the 3pt and I really want to recondition my gravel drive to get the ruts out of it, I run the 3pt control fully down, crack the valve on the HydrauLink and ease forward just a bit. Close the valve and I'm now fully engaged on both blades of the Plane. If I've got a low spot in the drive, I can mound some gravel up on the low spot and then back over it the Plane. Then, instead of going with a full-down position, I'll set the Plane down and with the valve open, back up just a bit. This extends the 'Link and now only the back blade of the Plane is really doing work. Smooths the pile of gravel right out. And note, I never got off the BX to do these adjustments, just swiveled in the seat and worked the valve a bit.
For a rank amateur like me, it really makes it easy to figure out how your implements work at different positions, how much "bite" your going to get out of your Plane or Box. Drop the implement, crack the valve, move forwards or backwards (and I'm not talking alot here, just enough to put tension on the link and change the implement orientation), close the valve and try again.
One other good thing about it is that it does have some "flex" to it. If you have the teeth down on your Box and you're really digging with it, if you snag a big root or rock, the box will work around that obstacle a little better because there is some give in the system. Less broken tips or bent scarifiers... On the other hand, that flex sometimes inhibts your ability do dig with a Box. If I'm in really tough ground, I'll swap out the HydrauLink with an screw-type solid toplink and use it until I'm through with the really hard digging. But when I start smoothing things out, I'll find myself putting the HydrauLink back on.
If you're looking for an easily adjustable toplink, this one works really well... I'd say it's the toplink of choice, for what I do, for about 95% of my tasks.
Eagle