Overlay designer issue - limitted to 48 buttons

yes. more buttons could certainly be helpful for some scenarios!
In the case of adjacent MIDI keys a workaround can be to just use continuous horizontal stripes and use pitch bend range (and optionally note quantization) to divide them into smaller adjacent keys.

E.g. here an example of a 24x8 grid (thus 192 keys, four times more keys than the 48 button limit :slight_smile: )