Needs more solenoid 
I need to add something for the solenoid to strike to make it sound better, right now it’s just hitting the c clip armature stop so it sounds really metallic.
Hmm, How much space do you have to work with inside the case? I was thinking maybe making a small metal or plastic barrel and then filling it with something to help produce a thockier sound
From what I remember there’s around 14mm thickness of material that can be drilled or milled out