Well I am a big supporter of half hidden linkages.



Most companies don't offer them because they don't know how to compute them and it is then too risky for their business.

I've made a series of threads on how to design proper control surfaces for jets. I clearly recommend half hidden linkages there for scale and geometry reasons.
If the design is done correctly ( power requirements ) there is no risk of flutter with these linkages and the mechanical advantage is maximized.
Have a look here:
http://www.rcuniverse.com/forum/m_92...tm.htm#9266994

and here:
http://www.rcuniverse.com/forum/m_92...tm.htm#9272010