Originally Posted by
DaveSSS
Your comparison is not accurate. You put in the wrong angle for frame B.
I did? I got .3134 as cosine for HTA of 71.7 (I mistyped anlges in post as 71.5, it actually 71.7). But your way, add 3mm for slacker ST angle, the take away approx 3mm for 2 degrees of HTA, is way simpler. So thanks.