Physco....Well ... er.... Perhaps Hats
Dig in to some of these (Older) threads....
This is a gold mine, you do have to dig a little but whatever you are interested in with some reference to the Grateful Dead, you will likely find it here.
No offence to those not mentioned but, however,
Look up Posts by and including:
StrumminSix, Tigerstrat, KrzyKAt, 1960 strat, Waldo, Even Spacehead#### (AKA KOONZED) is a hoot
Read and Learn!