RE: Plank design info requested.
Like a Birdworks "Zipper".
Overall an OK flying sloper, but the EH210 airfoil has some real pitch changes with speed. It can tear around at breakneck speed and slow down nicely with elevator trim mixed into the throttle stick. PW-51 seems to suffer less from the pitch changes, and some guys I know were discussing cutting cores to update their Zippers. I got a 60" er, but I'd probably pick the 48"er next time since it fits in the trunk without folding the seats down.
*Tiny* elevator throws seem to be the way to go.