wow cool thread there Surebet.
I heard about another brand IIRC one time.. Don't remember tho. If I find it i'll post it.
Flankertanker Made a review on youtube of the TM first GEN of the Tracer Unit.
Found the videos:
YouTube - Tokyo Marui - Tracer Unit Part 1 of 2
YouTube - Tokyo Marui - Tracer Unit Part 2 of 2