Regarding the width, actually, the LPL carriers can be inserted sideways, so there would be a width limitation between the carrier and the column, if you were to maintain full compatibility. OTH, I've only used the feature a few times.
I can measure that later tonight if needed.
Any consideration of making carriers (inserts) for a Durst Femomask?
If anyone thinks LPL carriers are expensive, they are pocket change in comparison.