PS2 Laser Calibration

My bulky old PS2 has been acting flaky for a while. I was going to follow this guide and try to get it working again.

Anyone had good luck with this?

http://arstechnica.com/gaming/2003/11/ps2-repair-guide/3/

I was able to do this, along with a tweak to increase laser output ( https://www.ifixit.com/Answers/View/28616/PS2+Reads+CDs+but+not+DVDs ) to help it read DVDs.

Now some games and DVDs load immediately, but random ones fail to load at all. I've got a replacement laser coming, hopefully that'll do it.