Victor LS-RTK4 Firmware

This was mentioned in a thread here and I'm kinda interested in it. I have the Victor-LS with the T2 and use as a network rover. From what I'm understanding, this will enable the T2 with 6 engines instead on the one I have now ? Throughout the years of using the RTN, I've always been cautious using it, especially the vertical component results. However, using the Victor does enable some kind of verification although not as the LS does. Usually, I re-occupy any points when using the RTN as a basic verification and if there is any doubt, a long static observation, especially in high multi-path areas. My T2 has version 3.6.14 Nov 19 2018 on it now. Can the RTK4 firmware be installed on this ? If so, is the raw GNSS data still stored on the T2 ? Do I need to send the T2 back for an upgrade ? There's not much info on this and would like to know more.