Have it so that you can shift, then click or have a minus button on the talent tree screen to take away 1 point from a skill, instead of having to reset everything.
just position the top and right block so that they meet on the top right corner. position the bottom block so that it aims for the top right corner but move the top block as close to the right as possible. release the ball. move the top and bottom blocks so that the ball goes straight up and down.