Bergen Intrepid Magnum Tazer, Manual, Page: 83 / 88

Also mark around the inside perimeter, leaving only a ¼” or less of a
lip. Rough cut out the area with a dremel tool cut off disk.
Then use a large sanding drum to finish the cutout areas. The “ears” on
the top are required to clear the pushrods going up to the swashplate.
Depending on the size of battery you intend to use, the dimples in your
canopy may NOT match the standoffs. Using 2 ea 6s2p packs side by side
in the frames for instance will not allow the canopy to sit back far
enough. In this case, locate the canopy as far back as possible and find
the new holes in the canopy.
With the batteries side by side, you may need to trim the inside lip of the
canopy to clear them as well. The point is, trim and fit the canopy
however needed for easy on and off use.