ZOHD Dart XL Battery Holder
This is just a simple battery holder, was fed up with balancing the plane, so made this, all you have to do is keep moving the battery in the holder until you are happy with the balance then mark position and stick the battery to it, i used velcro. Then slide it in pull the strap down and fly, it can't move due to the fact its locked in and all the strap has to do is hold it down, makes changing batteries a lot easier too.
I have added the original 123d file and a step so you can make changes.
Malc