I am currently in the process of changing the two railko bushes in the gearbox. First one is nice and easy but do you have to remove the gearshift housing to get the one that the ball sits in at the bottom. I can get it with just the bias plate removed but there is a circlip holding the bottom one and it looks like it is ready to fall into the box if i try to remove it. Can this be done with the box in place