While I was out of town my order came in.
I got the original seats pulled out and the sliders put onto the new seats (they came with sliders, good deal) and sat them in place. They should work great.
Before I pulled out the old seats I took some measurements. I want the new ones a bit lower. Should work out great. I think I have a plan now for where the next tubes will go. I'll have the seat mounts attach to the cage.