I have been working on a reliable way to launch projectiles with mainsail engines. This is how far i have come: http://www./download/z61yxldnfp21ky7/Prototype_Railgun_MK1.craft How to use: press 1 to activate mainsail Press 2 to fire first projectile press 3 to fire second projectile. Press 2 and 3 at the same time.