Day 16 - To Trackball or Not. That is the Question

There's only a handful of games using trackballs: http://en.wikipedia.org/wiki/List_of_trackball_arcade_games

Of which the main known ones will be Marble Madness, Centipede, Missile Command, various golf games. But marble madness is lovely :)

In the pictures (click to zoom) the left edge to the Player 1 joystick centre is about 8cm (3 inches) and the right edge of the Player 2 button is about 5cm (2 inches). Is this enough? (still waiting for somebody to comment....). Overall the width/height of the control panel is 66cm by 33cm (26inches by 13 inches).

In the picture only the circle of the trackball is visible, the rest is the housing underneath but obviously must not overlap controls.

I prefer trackball at the bottom (if I have one) but it means the controls are higher up and more chance of the wrist having to lie over the ball.

I think I may need to buy the controls, place them and then buy the trackball taking a hit on postage.