It is still a prototype, need to see if it fits, the photo shows version 1 which does not fit. V2 is a new design and should fit.
Digitech Vocalist Live 2 Side cover, but it's the only model on the whole Internet (that's how great the demand is ;) )
No supports needed. Print flat on the biggest side.
At 0.5 nozzle use 3 shells
At 0.4 nozzle use 4.
3 or more bottom layers
3 or more top layers.
The author hasn't provided the model origin yet.