Made a little connector for the future engine sound mechanism. Basically, with my backyard-physics knowledge, I can either do a passively adjusting Helmholtz resonator, a rotor that spins and chops the air, or an edge tone. I hope to test all 3 and show you guys! [img1: Helmholtz; img2: Similar rotor in sirens; img3: Edge tone] The only worry is drag.