hi there everyone. i am in the process of building an rc air boat and i am using a ryobi 31cc. i bought the prop hub and welded my own engine stand. i just bought a wt-324 thinking it would bolt right up... well no. the throtle goes the wrong way and the screw is in the way of my mount. BUT... if i can get a carb spacer it would fit. is there anything wrong with a spacer? please help me here. i only need about half an inch to make it work. i just want to know if the space will hurt the performance of the carb/timing of fuel into the engine. thakns, Bruce