Help me find the lined vs. unlined head thread

I know it’s around here somewhere- the thread that discusses the virtues of a lined vs. unlined head, i.e. would having a lined head negate the difference in tonal qualities of different woods? Any suggestions?

Thanks,
Robin

this one?

Or, this one:

http://chiffboard.mati.ca/viewtopic.php?t=24186&highlight=unlined