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I'm a little tired of the constant implication, that because I have honest questons (no one here can answer), I "just don't get it".
Don't think for a moment I don't understand what's going on here.
I was after the mathematical expression... coz that's the way I roll - proof not faith
Integration, trigonometry & limits
Sorry Trojan, wasn't meaning to imply anything.The math to crunch out and solve for that point would be very complex.The Cad is doing the math with quite a bit of operator input.And since you are raising the question, with an unequal length, non-parrallel arrangement, the sweet spot isn't sweet at every point of the travel. The method that I described is "perfect" at the three points of travel that you input, but not necessarily in between. That is why I think that a mathematical expression would be hard to arrive at because your answer has to be limited to certain points of the travel etc.