These are just measurements of holes required for some buttons and trackballs, I have not used many of the irtems in this list, but they might be helpful to you...
Buttons
|
Happs Standard Pushbutton |
1 1/8'' |
|
Happs Miniature Pushbutton |
1/2'' |
|
Happs SubMiniature Pushbutton |
5/16'' |
|
Leaf Buttons |
1 5/32'' |
|
Atari Volcano Pushbutton |
29/64'' |
|
Standard Sanwa/Seimitsu buttons |
30mm |
|
Small Sanwa buttons |
24mm |
Trackballs
|
Betson 2.25" Trackball (lip exposed) |
2 1/4'' |
|
Betson 2.25" Trackball (ball exposed only) |
1 15/16'' |
|
3" Happs Trackball Standard (expose lip) |
3'' |
|
3" Happs Trackball Highball (expose lip) |
3 1/4'' |
|
3" Happs Trackball Standard (expose only ball) |
2 7/8'' |
|
3" Betson Imperial Trackball (expose lip) |
2 7/8'' |