A little aesthetic suggestion:
http://i42.tinypic.com/153wsxi.jpg these are two kinds of buttons, so I think there should be some space between them, not big - just some, maybe about height of one or two buttons. I think that would make interface more clear. BTW: I'm making a new RAOBF from scratch based on proportions from the file you sent me. Main goals are - toned down contrast and brightness and bigger, more visible numbers. Release will be soon
.