I redid the Allerting communicators of america Allertor 125 siren and the only thing that I redid was the entire front housing. I made the whole front in designspark mechanical and I also redid the hurricane 130 MKI including the entire rotator, the housing was also entirely redone in DSM and I made the maintenence cover for it aswell. I think my new MKI chopper is super accurate and I might try 3d printing these things.