Here's where the joystick push button modification comes in... some folks don't like to reach down by their knee. It requires a small reach, and it requires you to take your hand off the joystick. If you add on an electric diverter valve and locate the push button on the joystick, you don't ahve to reach down and you don't have to remove your hand from the joystick. When the push button is not selected, the joystick operates as normal. When you select the push button, the joystick left/right movement no longer controls the dump/curl of the bucket, it controls the AUX PTO circuit. So you push the button move teh joystick left or right and that motion now swings the plow left and right, or the grapple open and close, etc.... When you release the push button, the joystick retuns to normal operation. It is a good modification, but costs a few hundred bucks for the parts.