Ok, I'll try to answer all the questions but the most important one is yes. Damn it smoked smooth.
The strain is actually a cross. Several years ago I had a couple of Hashberry plants in with one Lockdown strain. Then during flowering I had a two week power outage and the temps dropped into the 20s. The Lockdown hermied a little and one of my Hashberry plants had a bunch of seeds. For the hell of it, I planted a bunch and the resulting plants had physical characteristics of both Hashberry and Lockdown and I've been growing clones of it every since. Very hardy plant and the smoke is VERY relaxing. My wife calls it Yoga Weed because it always makes her want to stretch.
Definitely can tell the difference between 4 months and a year. It just gets smoother tasting and seems to have more "couch-lock" to it.
So far my longest cure is 2 years but I've got several sealed for longer experiments.
I found a jar on 1/6 that I know was sealed for between 18-28 months but that's as close as I can narrow it down. I posted about it here
https://www.rollitup.org/harvesting-curing/607748-mystery-smoke-least-18-months.html
Actually I found 3 but I've left the other two sealed. I'll pop another one in about a year.
And I've got a final jar that I will open on it's 5 year anniversary, 9/11/2014.
I have decided to do a few things differently with my next batch. Up until now I've been drying things out pretty good before vacuum sealing because I was worried about mold in long term storage. This batch seemed to have more moisture than my usual and I saw no evidence of mold so I'm going to be shooting for about 55-66% RH before sealing. I was a lot closer to 45% usually. To monitor this better I bought a bunch of cheap humidity sensors and I'll be dropping them into the my curing jars so I can check the humidity level without opening them up.
Also picked up a bunch of Oxygen Absorbing packets that I will drop one in jar right before I vacuum seal it.