overall, it sounds pretty good. cool and unique, although check out jax archilles hydra mando thread and i think you'll see alot of similarities to your design with his black mando.
as for larger shoulders, tk bells, likr my brother uses, or scout trooper bells like i use work great. we both have bicep armor as well. his are modded mx bicep plates and mine are scout bicep plates.
the only "in universe" element for any type of mandalorian law enforcement comes from the journeyman protectors of concord dawn. part of the mandalorian sector and many were in fact super commando's including jango fett and jaster mereel. the only known marking is the red fgrthbelt as seen worn by boba fett. i wear one on my custom as homage to me being a police officer in real life.
overall i really like what youve got planned. although i must admit the red and blue led "takedowns" may be a bit over the top on the design lol.
keep us posted! and don't hesitate to check out www.mandalorianmercs.com our site is close friends with tdh and we're the lfl licensed costuming group from custom mandalorians! lots of help to be had there.
