Implemented my piston-driven engine design into a crude paddleboat. Directions: 1)VTOL up to almost the first notch to prime the engines. 2) Activate Groups 1 and 3. 3) Throttle up to about 15%, this should make the forward and rear vertical pistons go up and down. 4) When the vertical piston brings the horizontal piston up or down 45 degrees, activate group 2, or 4. (Group 2 for the front horizontal piston, Group 4 for the rear horizontal piston). The pistons should drive in a circular motion, turning the driveshaft of each axel. Engines can only run around 70% max (otherwise they get funky), and steer with roll. I put 20+ hours into making this so an upvote would be appreciated! Enjoy!