I bought this case, not to hold two M9s, but to hold a IBM 3581 L33 Tape drive. It's the perfect size to hold the drive and keep it safe and sound when shipped over the country. I have used the same case for a IBM 3581 H22 Tape drive for years now and it's never been damaged or caused any issues. I recommend this case not only to M9 owners but to anyone needing a good strong case to ship delicate hardware like IBM Tape Drives.
Pros: Easy to modify
Cons: None
This review was written in the old system and had content requirements that are different than reviews written today.