Thanks!
And, btw, wow - that is a serious display case...
I'll keep the airflow/moisture concerns in my mind. I'll be putting in some gel packs and drilling some holes shouldn't be an issue.
I also have as a 'rule' that no razor will go in there before having had a through, professional clean and restore - that might help a bit as well.
Anything I buy on the bay is in "quarantine" until I get them looked at ;)