Regarding bracing:
If you take a look at the video for Liseberg, Sweden at www.themeparkreview.com/videos you will can see how Balder is laterally braced. Some of the turns are just insane (kinda like where I got the idea for some of my turns that folks told me were impossible to have); but you can sort of see the bracing and how they are supported. You can auto-support to do most of the work if you want, but there will be some lateral (custom) bracing needed to truly finish things off.