Tank treads since we already have people making tanks why not help them out it makes things a lot Easier it would reqire a way to connect the weels though like select the weels you want to connect with tank tread by clicking them in a edit (X-ray view)

Also add differential airbreaks set to rudder if one is on the left and the left rudder is applied the breaks on the left will open this would be great for flying wings and other tailless creations (reference is a go-229)

Also how's about a new weapon to like a smart bomb of defensive flares