Stop in for a cup of coffee

Was in buddy’s shop until after 9 pm.
I was working on an 80’s chevy.
He was working on his airplane.
Had the airframe stretched 30 inches and bigger wings built.
As an experimental aircraft its called a bushmaster. Float plane.
He was struggling to get more travel in the rear flaps. Trying to reshape the stick,when i suggested he lengthen the lever that attatches the cables. Big difference with a little change.