Setting the units to inches and inserting the ref at a scale of 1 ends up with a ref scale 0.0394.
I was reading that line and was thinking you were using that value. My bad.
What I learned from your response = my good.
Thanks. I am going to remember those tests of yours.
I am not really sure if it does matter for speed. I am usually only concerned with it working, with the hope that some day some poor programmer will fix it all for me, for payment of course. I never stopped and tried to add the fraction in VB. In theory, it should produce the same result. The time difference, unless noticeable, is a last concern.
My point was that using 0.0394 to scale with, vs. .039370078740157 may produce slightly different result. I am having to split hairs all the time, scaling from metric to imperial and back and so I went with the largest number I could find. I just misunderstood what you were saying. You are not using the value 0.0394, correct? It appears to me that your fraction may actually be a tad slower, but would probably produce the most accurate result, if one is more accurate to the other through VB.
PS. I am still trying to digest that stuff of yours on the first page of the swamp.