This looks awesome!
For another drum keyboard tho) Interesting why they allow you to post this on marketplace. No doubt my 3D keyboard is very simple and clean, but it means it’s very flexible to setup on any needs. Even for haptic gloves usage. But I guess someone could find that the custom keyboard is a bit expensive and choose the common one.
More info about VR multilingual keyboard here: Immersive Keyboard (procedural). - VR and AR Development - Unreal Engine Forums