ORIGINAL: Tom Antlfinger
My solution was to tape that side shut after I got the circuit board and packs properly seated with Scotch Brand Gloss Finish MultiTask Tape that you can buy almost anywhere. Used longitudinally across the joint of the cassette, it has essentially zero stretch.
Finally I close the pack down with the screws.
Tom,
I'm sure your tape worked OK, but it doesn't work as good as my labels!
Believe it or not, the 12X battery cases actually have a tiny bit more room and is not as tight.
Glad you got it in there OK.
Chad