So here are the details about Headband and Sour D. All this was taken from here:
https://www.instagram.com/p/BfteUnoH_MI/
Headband - I think it has a few different names
kloppglass = the weasel
(stop and listen ) the chem 91 was crossed into a Northern lights this is my first cross from that I took 100 seeds labeled them one through 100 the first one the one the underdog I referred to the seeds as chemlights
kloppglass
Later I took one of the male chemlights and crossed into superskunk the sourDiesel was born out of a half pounds of weed with seeds to Vondo kept Some of the seeds for myself grew them out Vondo handed me a cut back I grew this along side of the seeds that I did Sometime do you do ground 97 AJ got his cutting Vondo says he got his seed from me in aDifferent bag of weed
Headband = Mass Super Skunk (or VA super skunk - Skunk VA gave it to Chemdog) x (Chem 91 x Northern Lights)
Here are the deets on Sour Diesel:
- growmoremids
@kloppglass I’m beginning to think that you are talking about a completely different plant than the Sour that I know. Now, I can’t really say what exactly transpired after I left NY in the fall of 96, but I certainly know what went down before. It seems that the upstate side of the story has been largely omitted from the general narrative — so here I am to try and shed some light. First. This was a series of happy accidents coupled with an equal number of unfortunate events. Sour was not intentionally bred. Secondly, Sour is not the daughter of Chem, she is the grand-daughter. Let me explain...
- growmoremids
This all started in the early 90’s... Chem made her way to NYC. There was a group of us who were all brought together because of a shared love of the Grateful Dead, glass and good weed. Around this time the Chem started making her rounds... no one liked the name “Chem” and we collectively began referring to her as the Diesel. Diesel started of as a descriptive for anything we would pay $500+ an ounce for, to which the Chem/Diesel became the defacto standard. I was fortunate to have access and was lucky to collect a bean here and there when they would mysteriously end up at the bottom of a jar. Even though I wasn’t gardening at the time, I had the foresight to collect the beans. By the time it came to put the seeds in the dirt, whose to say how many different Chem crops my small purse of seeds came from. So whose the daddy? That is the million dollar question. And one I believe to be unanswerable without the help of science.
- growmoremids
It wasn’t until the winter of 94-95 that these seeds were germinated. Swell and I got a place in upstate NY to start our first garden. I was supposed to get a Chem cut after I brought back a bunch of seeds from Amsterdam for my friend with the Chem; but you can guess how that went. No cut for you! Instead he gave me some RFK beans and some Kyle Kushman’s PK beans. Thank you!!!Fortunately, we had collected those Chem bag seeds. Out of the dozen or so seeds, only 3-4 made it to finish to which the #2 was selected as the keeper and revegged. The others were either hermed the f out or meh. But not the #2, she was a beaut. And what would you know— more happy accidents, seeds in the #2! So whose the daddy here? We can limit this to only a handful of potential donors. The RFK’s were banana factories. If I saw that shit today, it would get culled with a quickness... back then we didn’t know any better. The Chem seeds all showed hermed tendencies too... not quite like the RFK banana factories, but enough to notice. There were herm tendencies noticed in the #2 as well... so maybe these beans were selfed? It is certainly within the realm of possibility. Personally, I feel like the RFK is the responsible party...
- growmoremids
The seeds from #2 were put away until winter of 95-96 when one of the homies came back to the east coast wanting to start a garden. I helped get his garden set up, gave him some cuts and a bag of beans labeled, “Our Diesel”, to which he added the “S” in front of the “our”for all the sour folks out there! Nothing to do with the smell, and everything to do with the play on words.
This is how THE Sour Diesel came to be. All others are just a lights 
So they think Sour D = Chem 91 S1 x RFK Skunk (Hermie) or Chem 91 S1 x Chem 91 S1
