RE: Mach 1 , Does it need right thrust?
Most of the older, "ballistic" Pattern ships had 0-0-0 setups. With the way they were flown, this worked out very nicely. A very few had other force arrangements. What you did find was that the designer/builders added/reduced the amount of incidence, up/right/down/left thrust as was required to get the airplane to fly the way they wanted it to.
Even dihedral angles can be changed after building...I once read where Don Lowe would saw a slot fore and aft at the wing centerline from the topside to about 3/4 through the wing. Squeeze in some epoxy, weight the wing to a slightly-higher dihedral angle, and allow it to cure. Then add a wrap of 6-ounce 'glass cloth around the center of the wing. Presto! You've altered the dihedral angle. If you cut up, from the bottom of the wing, you could reduce the angle by using the same method. The small kerf would allow a change of a degree or slightly less.
It's all part of "tuning" the model to suit how you wish for it to fly.