the vj combo I've done several times. probably 8 or 9 of 'em.. no sweat! It's the same as the head version.. the only difference being if you have a version 1 or the later versions. the v1 sucked! but.. I have V2/3 boards here so we don't care. I'd just swap it out and put in a couple new standoffs *they are different* and you'd have a Version 3 modded. the champ 600 can be done better. the speaker does kill the pants off it.. and they have some issues with room, etc... but it's doable and there are quite a few mods for it, too.