Hi ! I bought some months ago a Variax acoustic 700 at a extremely low price, and it turned out that it doesn't have the motherboard. I understood that it is impossible at this point to buy from line6 or Fullcompass a motherboard, but I see sometimes second hand parts for sale, and this is why I need help with the following:   - What is the part number for the motherboard of an acoustic versus an electric variax 700 ? I see different codes "flying around" (on internet, in pho