1. Wider gears to make it easier to align them. 2. Holder + Grabber, basically a holder that can grab onto the items in the basket. 3. Hard missions: Smaller construction box, limit number of parts, blocks like water and vacuum have limited use, only allow certain parts. 4. Tar block: Shoots tar like a water cannon, works as a sort of glue. Tar is highly flammable. Change viscosity of the tar. Thicker tar will be more sticky, shoot shorter, and burn longer, thinner tar will be less sticky, shoot longer and burn quickly. 5. Smaller wing-panels 6. Reduce mass of aerodynamic propellers (both normal and small). 7. More interacting parts like water cannon + heat. An example could be boulder + tar + fire = big flaming boulder (very limited usage of this particular example, yes, but it's just an example). 8. Programmable blocks (maybe a NPC model that can affect nearby blocks) that can activate blocks in a given order with or without delay. Example: 1: turn steering hinge 30 degrees forwards, 2: wait 2000 milliseconds, 3: turn steering hinge back 30 degrees, 4: fire cannon. 9. More machine info, like weight/mass, length, width, height, 10. Part standard settings, as in the cannon is by default set to fire with the C key, I prefer to use the 2 key.