My dad made his own for maybe 100 bucks. The rotunda one is the preferred method i'm sure but not cost effective for the one time use people most of us are.
Thankfully I inherited the tool my dad made since he has his own machine shop!
Your rates are really good Alan. I would charge more if I did it lol. The couple times I have done it in car it was quite a bit of work.
96 v8 4.6 explorer, kooks headers, off road x, magnaflow mufflers, cl tb/plenum, lmaf, gt tube, xcal tune, alum shaft, 3800 dirty dog converter, darrin trans, 373 gears, hoosier slicks on fanblades, pbr brakes, Skinnies on front, No PS or AC, Aeromotive EWP, major weight removal (3380 LBS), 12.78 OLD COMBO.