Steve--

     So if I am understanding you correctly, once a V70 receiver is updated via a V75 receiver, it will then be able to operate in RF2 mode.  In the case of my V70 Headset system, will the bodypack then also need an update of some kind to allow operation of that system in RF2 mode?  What about the V30 handheld systems; will the HH unit also need an update to operate in RF2 mode?  The reason for asking is that I currently own a V30 HH system, a V70 HS system, a V70 HH system, a G50 guitar wireless system, and plan on buying a G90 guitar wireless system.  I plan on buying a V75 HH system to get the extra models and upgraded firmware, etc., but need to know that ALL my systems can be upgraded to operate in the RF2 mode and get the benefits that this provides (less interference with 2.4 gHz wireless networks), as I plan to use a wireless network created on my Macbook Pro to use in conjunction with an iPad, and I CANNOT have my iPad losing connection with the host (or even having extremely slow connections) due to wireless mic interference.  Please provide any additional insight, potential pitfalls in my scenario, etc. that I may not be thinking about.  Bottom line is do I need to sell ALL my V70, V30, G50, and G90 systems and buy the new ones to ensure that I do not lose network connectivity between my iPad onstage and the host computer, or will buying one new V75 system and performing updates on the others suffice to give me the protection I need.