Sorry, I just realised that link doesn't have great images. Here:
http://www.rckingdom.co.uk/smf/index.php?page=179
The Firestorm series trucks are very decent machines, not Rusty-knockoffs.
It even says "Castle Link(tm) compatible for the ultimate in race tuning." I kinda wish they'd kept the Castle branding though, instead of making it their own.
