I tried "Rocklite Ebano", which is some kind of actual wood infused with resin and jet black dye, it looks nearly identical to ebony, and machines and sands like any other hardwood. Unfortunately that company went under during Covid, but now there are a bunch of companies experimenting with (and selling) ebony and rosewood substitutes. Let the violin and cello makers have the true jet black ebony, IMO (while it lasts). The knock I've heard on Richlite is that it's basically compressed layers of paper, infused with resin and dye, so it can have "witness marks" where the final sanding exposes the transition from one layer to another. Not seeing that on the 4030 pics, in which case looks good to me. It's a very hard, dense material that mimics ebony pretty well. The Squire Vintage Modified Fretless Jazz used a lined Richlite "Ebanol" board, and it "mwahs" like a champ. Maybe the cork sniffers could hear some incredibly subtle tonal difference between that and ebony, I myself could not.