ORIGINAL: daboosailing
I agree with DR1. I'll also go on to say that differential can be a good thing in a trainer to alleviate adverse yaw. I don't know if your SPAD is considered a trainer or not. Certainly a real SPAD isn't! Differential can affect how symmetrical your rolling maneuvers are and if this is important to you, work towards equal up and down aileron movement.
Mark-
I assume his "SPAD" that he is referring to is a Simple Plastic Airplane Design, or coroplast and gutter pipe creation, not a WWI fighter. Otherwise, good advice.
I recognized your screen name in another post of yours. Hope all is well up in
PR. I might be up next weekend and if the weather's good I'll head out to the field.
-Scott Johnson
(TCRC)