I have a G P Stearman with a zenoah g23 on it.I finally have the right prop which is a 18x6.It allows the engine to spin 8000 rpm on the ground.I hope to fly it today if the weather is good.I have flown it with a 16x6 and it turned way to many rpms.Then I tried a 18x8 and it would only turn 6400 rpms.Anyway it flew very nice roll rate was slow but i am one of the before mentioned that has a problem with the slave rods.If you set it up per the inst. book thetop aileron throw is too much compared to the bottom.I cannot get the recomended high rate of 1" on the bottom without bottoming out the throw off the top.I lined up the rod to match the wing strut and the measurement fell exactlly were the inst. recomended.I hate to drill more holes but any way I try to use the recomended spot it will not work right.but it still flys good just roll rate it slow.I will redrill and correct this problem just not today as this is the first day without rain in 10 days and I just have to put it in the air again. P.S. be ready to add rudder on takeoff as it will pull.I put more right thrust in it during the rainy days and I'm ready to try it out.As for as landings go the gear is stiff so I flew it in rather than flare it and it handled and looked real nice.I will rate the stearman as well built well looking and well flying airplane.A few off the guys at the field were saying how scale it flew and looked.They said arf's have come a long way to look and fly this good.