Now, "the bulk of the seat to be forward of the shooter, NOT under the fore-leg"
1. I don't possess a fore-leg, I'm not a quadruped. I possess arms and legs, two of each, in more or less matching pairs. WTF is the fore-leg meant to be in that context, the shin?
2. Bulk of the seat: centre of gravity of seat, geometric centre of seat, "bulk" (>50%?) of the filling, bulk of seat material?? I'm not counting the beads to make sure half of 'em are in front of my knee!
Can't understand why the rule couldn't just be added that the bag can't touch the backside. Or was that too simple?