Cheers. I do like the build quality and design. I don’t believe I can get the Sequoia to ride lower.
I would try this to get the belt to sit on your hips instead of riding more above your "hip crest" (Illiac crest)...
There are 4 connections from the harness to the front lower D's. Per Lower D there are 2 connections, the lower D strap connects to the leg strap, the upper D strap connects to the harness belt.
The upper straps control the climber's body "pitch" in a "feet off the tree" hang position. The tighter the strap adjustment the more upright the climber sits in the harness. If the strap is adjusted longer between the lower D and the belt the climber is tilted back during the hang position.
I've noticed that off-the-shelf harnesses of any manufacture that have pitch adjustment tend to be adjusted for a more upright sit position. That feels pretty nice initially when a climber clips in and gets their feet off the ground or off the ground feet on the tree. It can be disorienting to feel tipped back in a hang position.
It is much more comfortable in actual climbing to have your harness pitch set so your upper body is tipped back a bit. It balances your overall center of gravity much better between your leg straps and waist belt. Your leg straps will tend not to bite into your crotch, the harness belt will stay on your hips much easier.
It's not much effort to hold yourself upright when you want to, particularly when your feet are in contact with tree parts. With the pitch balanced this way your overall movement in the tree will be improved a lot. Mileage varies per climber body type, climbing style etc. One thing I really like about this pitch adjustment it is I can keep my leg straps a little looser so if they do ride up because of a particular body position while climbing, they tend to self correct as I continue climbing. Same for the waist belt.
Like any harness adjustment try incremental changes opening the upper D straps out and find your sweet spot.
-AJ
PS: Not trying to talk you out of selling your harness. It's an excellent price, someone nab it now ;-) If I had the loose cash I would buy it in a split-second no photos required.