I have three props to try on this plane 22/8,23/8 and this are Mejzlik,the other is a23/8 bolly.I got the tune pipe set-up with my engine from DA and I am very pleased with it,but the plane turned out a little heavey [16.5].the other thing i did was i used carbon rods on all controls incuding rudder.PS the CG is 1/4 behind the wing tube.