Antique: well put and he will not have spent any $$ and will have had a good learning experience on disposable carb.

aero nut's suggestions are good also.
Based on my homie25 and APC 16-8 16-10s, I would not hesitate to try a 18-6 as well for more thrust and engine loading. The additional air volume flow at lower rpm offsets the higher rpm. Load at idle seems to make it a little smoother idle.