Hi Mike,
I'm pretty sure mine was the EX version but one of the early ones so they might have beefed it up again.

This pic shows the rudder closed loop with the elevator servo below it. It is a JR591.

http://www.tomlaird.com/articles/swallow/servobay1.jpg

I eventually changed the supplied undercart for a Carbon Copy one.

Oh I wish it would heat up - it's frezzing up here.

cheers

Tom