I have a new PS2 slimline - Model SCPH 75002. It has been chipped with a Modbo 745 (or 540)
I was told by the seller (and chipper) that Riteks are the best media and to burn at 1x in order to prolong laser life. He even went into detail about how different burning speeds affect laser performance (had something to do with grooves compared to troughs)
Anyway I've found the new unit a bit picky on some of the old games, but not all are on Ritek so I've given it some leeway. Maybe the laser is a dud already?
I'm interested in the fastest burn theory - I might give it a go.
Thanks for your help. Any other suggestions or information is most welcome