Ok, so I'm looking to purchase one of these used and found a case - however, the owner doesn't know what the spacings are.

My questions are:

Have the panel spacings ever been anything other than 25mm and 15mm on the mountain mods UFO?

Also is there a difference between (or is there) a mountain mods UFO and U2-UFO?

Thanks for all the enlightenment I'm sure I'll receive!