I'm finding it pretty infuriating. It was one of the reasons I stopped working on the designs I'd had on the go; I could draw designs I was mostly happy with, but couldn't figure out how to render them as genuine technical drawings. I got reinspired when I found this fret calculator today (http://www.ekips.org/tools/guitar/fretfind2d/), but a few hours in and I'm tempted to give up again. It's so much easier to draw by hand! (At least for me)
Yes. I know EXACTLY how you feel....
FrankenLab Hand crafting guitars, because Death Rays are expensive.