RE: viper
Yeah, don't try to hit a homerun on your first trip to the plate.....it's a long ballgame. Once you get a good idea about how the plane handles, then bring some tools, a cutting board, tape, glue, etc. out to the field and see if a little trimming helps. Without someway to measure speed right then and there, it's not easy to tell which way you're heading with changes. At some point the speed won't improve, the model will just become a useless brick to try to fly and land.