I already tried the capacitor trick, placing a 3300uF/10v one in parallel with the 4167B.
I have Ricoh 8x DVD+RW, Sony 4x DVD+RW (MIJ) and Verbatim 4x DVD-RW (MIS).
When I try to read back the written disc, the LG takes an awfully long time to recognise the disc. Running CDSpeed also gives the follow weird scenario, whereby the capacitity is not stated and i can't run any tests on the LG.
Sometimes, the LG may read the disc(s) fine but my Liteon DVDROM reads it with an ugly transfer curve. The disc may also end up unreadable on both drives, with cdrom errors in Event Viewer.
The drive still likes DVD+R, DVD-RAM, CDR and CDRW though