One detail I forgot to mention: My waist size is 42. I have the large size belt, which is what GG recommends for sizes 36-42.
One issue could be that I'm not using any pad at all. I like the increased ventilation in warmer weather, but I'll load the pack up and do some backyard hiking with the NightLight pad to see if that makes a difference. I'll also try it without the stay. I'm usually carrying around 17 lbs total, including food and water, and I always try to pack the heavy stuff near the top and close to the back.
I think I have the belt positioned where most would call the correct position. The belt seems to be in the right place, and the buckle is right over my belly button. I think the pack slides down, but the buckle stays in place. I tightened the belt nearly to the point of discomfort, but the pack still slid. I'll try fastening it slightly higher, and then slightly lower as others suggested to see what the effects are.
My subjective impression agrees with your statement. It is sliding down to where it should be. It seems to stay there fine, and it feels right to everything except my shoulders.
Good idea about sending the photo to GG. I just might do that after some experimenting.
Thanks, I definitely need to try buckling the belt below my belly to see if that helps any. I'm sure I could probably cinch it down tighter. Does doing this affect recommended torso size any?
You might be right about shoulder straps needing to be tighter. I'll try snugging them up more to see if that has any effect.
I think having the belt lower will allow me to tighten it tighter, so I'll definitely try that.