I wasn't happy with an enya 50 cx in the front so I upgraded to an OS 61 sf, and by crikey, she'll tractor out of anything I give her..

I removed all the pushrods from the rear end and used a y connector mounted to a fibreglass arrowshaft for the elevators and s/steel cables for the rudder, the authority is awesome. Too good in fact.

I don't trust pushrods on rudders for the very reasons described here.