Excellent article Kurt. Thank you very much for bringing it to our attention. Can I assume for the dating of that set that it was not used on Light My Fire?
The first Doors album was recorded in August of 1966 which was nearly a year before John got the Mod Orange set. The second album also came within six months of the first album so it also pre-dates the mod orange. There are pictures of the Doors in the studio recording the third album waiting for the sun and John is using the Gretsch. It looks like the Mod Orange set was acquired so that John could use it as a touring set and the Gretsch could be in the studio. Waiting for the sun was recorded in early 1968 and it is the last time I have ever heard the Gretsch set being used. John acquired a WMP downbeat set in mid 1968 which went on tour with the Doors when they went to Europe. I have seen John in newer footage where he is using a Pearl set with concert toms and the WMP 14' floor tom. Not sure if he still has the rest of that set.