I'm the Tornado sailor with AHPC rudder setup. This setup is what they make for their Taipan 5.8 cat...and they simply chose to use the Tornado foil section and casting mount point spacings on their Taipan's. Everything fit straight on to my Tornado transoms. Last year I paid about $650 USD for two foils, two aluminum castings, two tillers and few ancillary gudgeon pieces...including shipping from Aus. They claimed the heavy alu castings were countered by the very light foils...the whole assembly still coming out at near minimum weight for the Tornado. Blades seemed very light compared to all others I had picked up over the years. The trailing edges needed a wee bit of fairing since I got some humming at around 5-7 knots.


Here's another link on the AHPC site that shows how the lock down setup works: Rudder Lockdown System
Mike.