[schwartzenegger]You must vuse de formulars![schwartzenegger]
If its one pipe by itself, I'll eye-ball it. Thumb and feel.
If its 30 next to each other, I use the multipliers, and a magnetic protactor, levels, calculator, chalk-line, lasers of varying types, and a fresh jolt of coffee.
I just got done with a job doing about 20,000'+ of 1/2" and 3/4", all exposed for an Arch's office. If I saw anyone eye-balling I'd throw a fit, if not an object. I had under 10% waste, not bad considering, the amount that actually got bent. 50%