This auto-collimator eyepiece is brand-new from scopestuff. I honestly only tried it once and I couldn't work it very well, although it did help to improve my collimation. Some more experienced users swear by them. When perfect alignment is achieved the "auto"matic feedback is a "blackout" due to secondary mirror.
It does come with an instruction sheet.
I bought a laser collimator (collimating for dummies!).
$25 shipped (conus only) or make an offer. Paypal (no fee) preferred.