I'm going to give "long, room temperature steep" a go (not whole leaf - MacBaren Black Ambrosia: This is a special blend of choice, fully ripe Burley and matured Virginia tobaccos. A mild and tasty pipe tobacco with an exciting aroma).
1oz tobacco blend - ground down further in a spice grinder. I'm a believer in more surface area for an extract.
2oz PG
2oz VG
Sealed with the FoodSaver mason jar attachment. Shaken well. Moved to the basement with reminders to shake weekly.
I'm shooting for six weeks. I have three more varieties on hand, so I will likely start one every weekend. I'll check back in 6 weeks. Nothing to report until then.
Thanks for the thread and experiences posted to date.