I can't moddle what so ever,and seeing you are a very good moddeler+ guessing you are a spy fan
i had an idea for a invis watch:
Name:The Digital Disapearence/The Analog Assassin (depending on the way u make it look Digital dissapearence for a digital looking watch and analog assassin for anlog watch)

Stats:
Pros:Instantly appear(does not take time to become visible, meaning you can have a fast backstab)
:On succsessful backstab 50%of watch will be recharged.

Cons:Very Slow recharge(exact slowness is up to you to decide)
:Shorter time of being invisible

Collection: mabey link up with connivers kunai

P.S.
If you even do think about making it remember I will be forever greatfull :))))))

pls dont change stat ideas other stuff doesn't bother me as much+I don't want any credit if u even do this idea scince it is you doing all the real work