MadScientist
yes... glad i read this, i was just about to post that.
if the kit says you can use 2 than use 2, the advantages out weight the disadvantages (wich there really arent any) more power is always better right ?

also, if your plane is being built to go faster tha nthe original kit was intended to go, do the dual servos so you dont lock up the surfaces at hig hspeeds. as well as reduce fluter. also, whats teh torgue on those servos and are you using 4.8v or 6v?