Just adding to what you already stated. No linkage adjustment of the brake band should be done until its initial "size" adjustment is done. That the turning the nut on the band tight and then backing off one full turn. Then the clutch to brake-grap timing tweaks on the linkage should be done.
Also since he mentioned the right side - it would behoove him to hold the foot brake pedal down tight and see if he can still move the right steering lever freely. They often get rusted and fused together.