I have a G-90 wireless and TBP12 Transmitters I want to have 3-4 wireless units and use a multi selector to switch between guitars. The V-70 is 1/2 rack space will the TBP12 from the g90 work with the V-70? OR can we get 2 G-90's in ONE rack SPACE? OR 2-G50's in ONE RACK SPACE?