For our company Plextor will replace the drives no matter what. We have had no problems having them replace the drives with new working ones, that do correctly work for CD+G.
I am unaware, I don't handle the RMA's to Plextor themselves. Normally they just swap the drives for us no problem though.
You can try slowing down the Reading speed if you would like. If the 48x is working on this same disc, the problem is the hardware and not the reading or writing speeds. I recommend to read and write at the fastest speeds unless you have problems, then slow them down to something slower.
Thanks for the compliments.
