Manual index/ID assignment

We use Lookbook on a site selling industrial repair parts, where we use manufactuers’ parts diagrams that already have parts identified with numbers (or sometimes letters or both). For example, see attached.

We’d REALLY find it useful to have a text field in each Node we create to define the symbol (letter, or number and even a fontawesome-type font glyph) for each Node. Having to add the nodes in the order we want them numbered to match the parts diagram is somewhat difficult, and I believe this enhancement would greatly expand the markets for this plugin to include parts-sales ecommerce sites.