This is the final fix to an early level of mine (which was published when I didn't have sufficient knowledge to stabilize it). The level was originally inspired by @richardfu 's legacy level, Toolbox.
As previous versions of this level, amazing. Great combination of logic and ability with great mechanism and ideas. Thanks!
@RobotArtist Spoiler The goal is to use R to carry B to the staircase. Throw R gently to the grass side (under the water), then give a hard push to B onto the grass. Sorry for the frustration!