Geeetech i3 pro B e3d bowden mount with nut hole fixed

With this remix I intended to "semi close" both nut holes, the bottom way. in this case.

didn't get the reason why initially was both way open, up and down. it's moderately tricky to insert and hold in position the nut, and inserting the bolt with the clamp and get the right height for the bolt to enter the nut...

this way you can slide the nut, and it won't fall. just slide the bolt, and it will catch the nut, without holding it in the right place.

easier mounting, that's it.