The Evo also uses an under-the-floor system - very easy to install and ALMOST bone-head proof (I have to protect against myself, ya know). The Assy Manual is dated Sept 2007, so there has been plenty of testing done on this system.
This system uses robust spherical bearings (all metal) on each side (so no alignment problems) and three levers drilled in attachment to a torque tube (one for the actuator; two for the flaps).
I would expect that the levers might need tuning to work with the Sport wing = no big problem there.
The actuator has limit switches to keep things easy, and it is available on the internet for $114
Vince can get a look and post pics if desired: Fuselage chapter, page 99-111.