To improve balance, it may be good to actually consume the origin item when grinding enchants to books. Player would then have to choose between:

1. grinding without a book, get back the item and gain some xp
2. grinding with a book, get back the enchant and cost some xp

This could be a configurable toggle with prior behavior as default.

Sure, I can add this to the config.

Thank you for the suggestion! I have added this to the config for disenchanting now.