I was concidering the gp rv-4 60 size. But I wanted to go gas with it. I'm concerned about the short run times with the zenoah g20. Has anybody tried a 26cc. Like the SPE 26. Is this too much? I realize someone is running a da50. What does the g20 & spe 26 compare to as for nitro. I don't want to build a rocket. I just want the convenience of gas... Also I don't want it to get too boring as it might for me with an os 91 4c.