[Fidd]

16 Please add a soft "squeak" sound-effect to wheels such as the the negative ballast wheels, and trim wheels, as feedback that the wheel is indeed fully closed? Wheels that supply air of course can be exempted, as the "hiss" fulfils a similar role.

EDIT: On reflection, I think the problem is the way in which our "taps" (faucets?) operate. On your kitchen tap, when you turn it on, there's initial rotation of the tap, THEN water flows, and conversely, when you close the tap, the water ceases THEN the mechanical stop for further closing of the valve is reached. This prevents a slow leaking of the water because the tap is left slightly open, and allows a positive shut-off of water flow when the tap is in the off position. This should be how our air and flooding valves operate, meaning that in the case of the air-valve, there's no flow of air until a litter after initial movement of the valve, and conversely there's a positive cessation of air-flow even if the valve is left fractionally open when closing it?