The plane is very short, having no fuselage. It also has a closely spaced landing gear.
Add to that, it has no rudders. I think the right thrust is necessary. Normally I don't
incorporate much right thrust...a tad perhaps with a tail dragger.

I maidened my Mach Racer a couple weeks age, and it seemed dead-on.

....I would leave the right thrust the way it is.

FBD. [sm=regular_smile.gif]