1. About 6 months.
2. Kneeling cause I'm not a freak. Sometimes weighted.
3. Sets of 10 unweighted pretty easily. 3x10 with 10kg on my low back is the heaviest I've gone so far.
4. About once every other week, 3x10 either weighted or BW depending how fatigued I am.
5. Nah.
6. I go until my chest is an inch or two from the ground.
7. I'm much stronger off the floor on deadlift. My abs were really holding me back before. I've never maxed beltless but before hitting the ab wheel I would occasionally have trouble pulling 405 no belt. I hit a fairly easy 490 beltless (in sneakers nonetheless) a few months ago with a belted max of probably 520 at the time.