There is a photo of some 3 year old trichomes in the Potter thesis that everyone here has read several times. There's a lot about trichomes there, not as comprehensive as we'd like still. A lot that makes sense but contradicts others. For instance I remember before the trichome advice instantly became standard. Never did get a loupe much less waited on trichomes, and didn't miss anything it seems.
http://www.gwpharm.com/uploads/phd_david_potter_jp.pdf
Speaking of a quick sip from a fire hose, hee, hee, hee...................
Thanks for your quality insight as usual brother GJ!