Okay thanks Super Moose 93 I'll try that out

*generic silverret tutorial post*

https://www.youtube.com/watch?v=aumfcypbW_k

This is what I figure out, and with the corkscrews its just a nightmare

thats a wonky cobra roll

I'll say use
-halfloop
-large corkscrew
-large corkscrew
-half loop
for a realistic cobra roll

using large loops looks better but you need to use opposite half loops (so the bottom of the half loops are close together and the tops are far apart)

I'll say use
-halfloop
-large corkscrew
-large corkscrew
-half loop
for a realistic cobra roll

Oh I know why it wasn't working with the half loop, because I was using the large loop thing, but where do I put the corkscrew connectors on the corkscrew?

just support the middle of the corkscrews (where they join up to each other). also, watch that video

Here is a good tutorial from Silvarret on what you are asking about:
RCT3 Tutorial - Silvarret - How To Make A Realistic Coaster - Episode 6 - Supports
http://youtu.be/tAdMtLQTlOA
He does show how to do supports fro a cobra roll.