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Robert: The first year I grew corn it was only about 10A I picked up a used two row 3 point planter. I had a pair of lower links Cat I, so decided to fabricate a hitch for Farmall 130. It was already equiped with 1 point fast hitch. Initially I got 2 pieces of 1-1/4" round bar to put through hole for rear cultivator mount. I welded a pin for lower link plus a head on the round shaft. That mounted it very much like yours. Problem was top link controls depth of planter, thus that back presure on top caused the lower links to flop tight one side or the other and ocasionally change from side to side. Of course with the lower links attached directly at final drives this caused them to be close to parallel. 30" rows were not very constant. I took a look at factry 3 points saw the principles of how they worked. I then got a section 3/8" wall 3"x3" square tubing, long enough to reach between final drives. I welded a plug in each end with 1-1/4" hole, and pinned it in there using the pins I had already made, devised a system so square tube couldn't turn over. Then I welded lugs about 20" apart on the square tubing for mounting the lower links. Then when I wanted to remove this and change back to my 1 point all I had to do was pull those 1-1/4" pins and unhook vertical linkage at the rockshaft. This made ground working tools center behind tractor. I see you have a stabilizer on your hitch and that will work fine for above ground equipment. but stabilizers must be removed for in ground equipment or you cant steer. This made my planter trail true and centered with tractor. If one started down a row, planter would center within 10'. You could easily do similar with what you have, I wouldn't bother unless you are pulling in ground working equipment.
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