Hi,

So as a potential feature request my idea is as follows:

A lot of mods allow you to repair items, so the impact of disenchanter damaging items while extracting seems to make sense, it is easily overcome by an item-repair functionality from another mod. Would it be possible to add an additional requirement of having the necessary XP levels to extract the book? Sort of like a reverse anvil situation

Currently more enchants on an item means more XP required at an anvil, thus in reverse at the disenchanter in order to disenchant an item with a lot of enchantments it would require a lot of XP for the first disenchant, less for the second, etc. The disenchanters could also extend the fluid capability and use XP from attached tanks vs the user's XP bar (to not break automation)

With the next version it is now possible to force using the jar of experience as a target when disenchanting (instead of books), and configuring a negative experience gain from disenchanting.
Therefore it is technically possible to add an XP-cost to disenchanting, but of course the original intent of this, I assume, is to add an XP-cost while still getting an enchanted book.

Thus I'll leave this issue open and mention the above way as a half-way milestone towards the actual goal.