I'm not sure what the threads on the cherry bomb are, and have no way of measuring them. I would be surprised if that tube had the same threads as the cherry bomb, but I could be mistaken.
It's too bad that tube didn't use 1.375x24 TPI that's becoming standard. Then you could just use a Q Plan B mount.
The Cherry Bomb will not work with the 13/16ths threaded adaptors, the Cherry Bomb has a tapered shoulder as well as a external thread, and the shoulder provided the sealing.
The Cherry Bomb has a major diameters at the threads of ~0.895".
Is your adaptor removable? what are your tube threads?