Having been away from ECF for 2.5 years, it is nice to sign in again! Had been a very occasional visitor during that time, but never logged in (just reading here and there). After reading the ENTIRE Rayon pt. 2 thread, have to share my experience.
Before I do, want to thank the OP, Jeremy for all of the hard work in putting this thread and the one before it together. Also want to express my appreciation to all who contributed. My initial thoughts of rayon were not good ones. This thread and some fiddling on my tank changed that!
My first build on the Griffin with Kanthal fused claptons (2x26 core/32 wrap) produced meh, don't see what the big deal is results. Flavor wasn't remarkably better and the coil gunked just as quickly as KGD cotton. This picture was before, should've taken one after, doh!

Since I had just upgraded my entire vape setup to a Vaporflask Stout and a Griffin RTA, I wanted to mess with TC using Ti and SS316L. My first experience with TC using nickel on a Vaporshark DNA 40 sucked. Once the new rolls of wire arrived, building and tinkering began. I claptoned 34 Kanthal around a 24 SS core. Was less than pleased, but not ready to give up yet. After asking myself how a single strand spaced coil could possibly outperform a big, fancy clapton, I put in a 10 wrap, spaced, 24 ga Ti coil.

All that can be said is OMFG, what have I been missing?! The break in was rough, but after 3 ml the flavor is unfreaking believable! Originally my goal was better longevity, with improved flavor a secondary goal. I vape coil gunkers and wanted a lower maintenance setup. Rayon has improved both aspects so much, I'm a convert! So happy to be rocking an awesome build on a sexy as hell setup...

Sorry for the long winded post, but I want to encourage any future readers keep plugging away at it. Don't give up! From coming up though the Green Smoke cig-alikes, breaking open cartomizers to refill with nasty-... juice, to Egos with CE4s and Vivi Novas, to the first VV mods and Kayfun Clones ect, to what I have now has kept me smoke free for 4 years. The perfect vape can be yours!
As a final note: Jeremy, don't give up on TC. Temp control (on a stable device) + a good build in a good atty + rayon wicking = vape nirvana. Having lost track of how many devices/setups used in my pursuit of the perfect vape, I promise you it can be had. Thanks again man, you led me on the final steps to mine!