I have a Variax 500. Being lefthanded, getting a newer Variax isn't possible. But I look at all the new Variax's available, and I'm jealous of the fact that they don't require the VDI cable to power the guitar. They have rechargeable lithium ion batteries. I realize the battery housing is different, but in theory, is there any reason why a new Variax power supply couldn't somehow be retrofitted into a Variax 500?