Does the drop still hit 90 degrees, at all?
I don't know much about CoasterDynamix, but I would say this project is definitely inspiring me to buy one of there kits and assemble it(nothing custom will be done). Anyways, this dive machine is looking pretty nice, I like the layout of it. Have you created and finished any of these models in the past? If so, can I have a link to see your work?
As for suggestions and/or tips, I'm completely blank.