Kyle, Scrolls usually progress from larger scrolls to smaller.
With the shape of your knife, try starting two panels, starting each from the larger ends of the design and meeting in the middle.
See what you can come up with and one that pleases you.
i think it looks a bit awkward to do a symmetrical design in that shape. even though the design is symmetrical, it really is not in the constraint of the scale shape.
Easy !! Eliminate the last scroll in your design.
Start an opposing pattern from the other, wider end.
Adjust the terminal outside work from the secondary scrolls where they nearly meet in the narrower area.
Just a thought.
i think you should invest in one of the books on scroll design. you need to learn how best to fit design effectively in crazy lookin spaces. your basic spines look ok to me. it's simply one of making them work in a given shape.