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I'm staying out of the why / why not issue... just making a casual observation based on geometry.... and I can see what Dell is saying. Think of a triangle when you look at your 3pt hitch.. the implement can spin fore or aft on the bottom arms/pins as the toplink gets shorter or longer... If the implement is long in the rear, then it will contact ground at some point. if you have enough adjustment in the toplink to keep going, I can see where you would unload the rear wheels, as load is transfered to the rear of the implement. ( take a mower for instance.. it's long.. ). normally, with correct geometry, an implement will lift and swing up on the toplink and lower link swivels.. however with a long exagerated toplink.. you change the geometery and can no longer swing up ( assuming the implement is not somehow flexible.. etc. )without tipping the implement back/down at the rear of it, due to the long toplink forcing the topik connection further back as the lift travels up..... IE. the more you try to swing up, the more the rear end of the implement is pushed down, due to the action of the toplink pushing back on the toplink mount if you tried to raise the 3pt. Ever notice if you have an implement on your 3pt.. say.. like a conce spreader... if you have the toplink too short, when you lift the spreader it is tipped like it is going to dump it's load over onthe back of the N.. or if set too long as you lift, it tips back? Now take that to the extreme, with a long extendable toplink, and a long flat implement...mind you this is an extreme example.. etc. While some top-n-tilt may be ok with a back blade that is real close up to the tractor.. i don't think it will be as usefull for things like disc or plows / cultivators.. etc.. except for just bragging rights to own it. I see lots of CUT's that have hyd toplink and side link combinations that do grading and landscaping work.. etc.. Soundguy
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