After seeing Scrap Attack, I really loved it, but it's a shame I haven't seen much of it recently. Stiggy, this one's for you!
Currently, I have standing a tophat, measuring 6' 3''. The structure is similar to Kingda Ka's, except I haven't used diagonals since there isn't much movement in it.
I'm going to use something a bit similar to the Tomcat Launch (bungee cord), with a zero car. Enough words though, on to the pictures!
Overview:
What a maze of blue and yellow rods! It's a triple base joining the supports and a double base filling the gap.
This footer has a total of 23 connections to the tube. This isn't going anywhere.
And here's the two main tube-to-tube connections: one giving four joints at each end, the other giving three.
Here's the crest. I'm keeping it's shape for now.
Finally, every tophat needs a picture with this view. It looks incredible.
Like I said, this one's in honour of The Stig. His models never cease to amaze me.
Chris, doesn't mean I'm not doing a Norwegian Loop. >:¬D
Oh my gosh! This is incredible.
Hope you can find a launch like you said. 
