So I have the chance to pick up a lightly used one, but I am very concerned about the weird propriety/v8 gearbox. I don't really care for burst, especially knowing that its mechanical and about as reliable as a kwc 1911. But as long as semi and auto work, thats fine with me. I also like the externals even if it is the US model with die cast metal instead of steel. I would hope that if the shell did break or I want something different, that I could possibly get a Avalon MP5 gearbox to fit or even a lower/gearbox. So, would I be making a costly mistake for wanting one? or is it salvageable from the "eh" design choices vfc made?