It's a simplicity exclusive:
In the "non commercial" world like ours there's only one way to get it done right. It's a Simplicity pattened deck design. Full Floating deck on striping rollers.
In the "commercial" world (those zero turn units in the 12 -15 thousand dollar range) they come with the rollers, but a supended deck.
Notice how on ALL other riding mowers the deck is suspended under the tractor and you adjust the cutting height by raising or lowering deck with a lever. Whatever movements (up/down, roll, yaw) is the same thing your deck is going to do. Tractor moves up and down, so does your cut, and susceptable to scalping, etc.
On a Simplicity, the deck is "floating", that is to say, it's riding on the ground via the striping rollers. It matters not what kind of crazy movements the tractor might make because the deck follows the ground, not the tractor. No scalping or other ugly stuff. Makes for a perfectly uniform cut, and because of the striping rollers they lay the grass over a little in the direction of travel. So you mow in opposite directions on each pass. In other words make a u-turn and the end of each pass. (but dont try that with yours because you don't have the stripping rollers to create the finish).
I could take some pictures to show you how it all works, but I doubt you'd be interested in buying such a mower, since you budgeted an LA style J.D.
You guys must have some tiny lawns with only two digit hour readings!!
I've got
450 "zero defect" hours on my Simplicity. Let me know when you get some serious hours on those LA John Deere's