Poul,

This is an ingenious way to align kitchen cabinets, even though your explanation is a bit hard to follow (I had to re-read it several times).
The only problem is that it requires users to (re-)design a series of kitchen cabinets without doors/fronts and a series of cabinet doors/fronts.

Maybe you can share the series of cabinets and doors/fronts you designed for your personal use?

If the Library Editor isn't functioning properly, maybe you can file a bug ?

Your question about pricing has been asked and answered before.

Hans