Now onto assembling this beast.
For starters you need to use the VF12 centre cartridge. So in the begining you need a complete VF12 turbo.
This is due to the larger compressor. There is a rim on the compressor back plate that the compressor sits in.
Example shown below. (thanks to SixSick6 for the pic, pic shows VJ11 compressor housing and RHC6 compressor wheel AFAIK)
On the VJ11 the diameter of the rim is too small for the VF12 compressor.
The rest of the assembly is the same as rebuilding any RHB5 turbo or hybrid.