Spectum DX6i Battery Cover

This started a a remix of Davross' DX4/5 battery cover but I can't seem to find that Thing now so I am crediting the DX8. The DX4/5 cover came "oh-so-close" to fitting on on the DX6i transmitter. I wanted to just make the minor changes required for a prefect fit for the DX6 and Davross had kindly supplied the 123D Design files. I downloaded 123D Design to make the changes and repost the files. Unfortunately 123D Design does not seem to let you go back and modify the sketches used to generat