1954 Paper Money Questions

Charlton Cat. on paper money has for years had this small one paragraph headlined as Grading Tip: " 1954 Devil's Face and Modified notes normally have wavy or rippled edges, as issued, when in original uncirculated condition.
Sadly, the ripples have been pressed out on some notes in a failed attempt to "improve" them, resulting in a lower grade instead. "
This whole statement is just wrong, it leaves one with the impression that if you don't see ripples then it's been pressed that's just not right.
There were many 1954 issues that had no ripples what so ever when they entered circulation.
I've personally found in my collection that notes printed by BABN are far more prone to rippling then the CBN notes.
It would be great to hear what other collectors thought's are on this.
When buying do you require ripples on all your 1954 Banknotes?

This is a note I purchased quite a few years ago it's an excellent example of a note with strong rippling and embossing. I've always been worried that the embossing and the ripples will flatten out over time from being stored in the modern sleeves and in a binder.
Any hints on how to safely store uncirculated raw notes?