Hi @
HappyTraveler welcome to FC! I'll take a shot at your questions but keep in mind a lot of this stuff comes down to personal preference. So here we go...
1. I pack my stems fairly tight.
2. I use a medium to fine grind
3. I do use a domed screen (1/2") it does not clog too quickly maybe 8-10 bowls before I change it.
4. Yes different strains will produce more/less vapor
5. For cleaning I keep a mason jar of some 99% ISO and soak screens, stems, etc as needed then rinse with hot water
6. I push my bowls till they stop producing vapor so there isn't much left for re-vaping. I also think that would taste horrible. I do have about a half pound of very dark ABV here I've been saving but I haven't tried to do anything with it yet. I'm not a fan of edibles so it may end up getting tossed if I can't come up with an easy way to use it.
I hope this helped. Enjoy your solo... It's a great little device!