Took this info from two different sites:
LEINBACH 7200 Post Hole Digger Jr, designed for the narrow hitch compact tractor. The top angle hook allows for the digger to be hung in an upright position for storage. The adjustable control handle (black rod) allows for positioning of the swinging gearbox from the tractor seat or a rear standing position away from the digger. Thus the auger can be positioned to dig a straight hole. The gearbox has tapered roller bearings, which run in oil. The one piece cutting bit is replaceable. The boom with its seven adjustment positions and the longer 3 point arch hitch allows for the Jr. Model to fit most compact tractors.
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The main difference in this post hole digger and the L7300 is that the u-frame is made narrower (24 instead of 26? to where compact tractors can lift the length of the auger, and it can fit easily between the lift arms, it also has a shorter boom to help assist in the high lifts.
The L7200JR is NOT the same as the L7200. The L7200 is not designed for compact tractors. You can tell the difference between the L7200JR and the L7200 but looking at the u-frame, if the U-frame is yellow then it is a L7200JR (compact), if it is black it is the L7200 or L7300(full-size).
About two weeks ago I went and bought the Speeco PHD from Tractor Supply for my Mahindra 2310. It mounts up nice, but... the highest I could get the auger tip off of the ground was about two inches. Even after messing with the bolt hole placement a few times, the highest I could get the auger tip was that couple of inches off the ground.
Oh, I could have went higher but the cross bar that houses the fuel tank is in the way...
The problem is that the boom pole for the PHD curved upwards...
...then at the auger connection it curves down.
The problem isn't that I can't lift it higher!!!! When I decided that I would return it to TSC, it just so happened to be the same weekend my stepson came out to visit and I told him I was going to return it because I does lift high enough. Well being 24 years old and knowledgeable of all things in the world, he got the keys to the tractor and had already started the tractor before I could get there... oh silly me... "It goes higher, you didn't push the lever back far enough...."
I can't blame him though... I should have explained it all before he jumped the gun, or had the keys in my pocket.

He ended up bending the crossbrace into the fuel tank, thank goodness it's plastic and flexible. Thankfully, the bolts for the SMV sign mount didn't
extend below the bracket or it would have punch holes in the tank.
From looking at the Leinbach, which has a straighter boom, and the hoop mounts over the top of the boom, so it should fit better for my tractor. Now to find one in my area or find one online that won't charge a limb for S&H.
Ted