Rockfish rear bumper installation question

Swede has a TJ

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Joined
Oct 15, 2021
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20
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Colorado
Help me Obi Wan Kenobi you're my only hope!
So I go to install my Fishbone Rear bumper. Everything is going fine until I go to install the inner bolts. Which I drilled off the provided template. It's so tight between the rear frame and the gas tank, which is full, I can't get to the bolt holes.
Has anyone else installed one of these and do you have a Ninja trick, short of dropping the tank?
 
Location 1 and 4 are easy to access. Location 3 is accessible, but requires being a little creative with your tools. We found it worked best to use a ¼” drive ratchet with a deep-well socket.
On some TJs, location 2 will not be possible to access without lowering your gas tank.
 
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If you can't fish something up there, like a flag nut, you know what you have to do. Dropping the tank isn't a big deal unless you forget to depressurize the tank or pull the fuel pump relay and have a buddy run the ignition blasting fuel in your face.