This rom & part two worked perfectly on my CVUK-PC06-2GEN which came with wmt2.1.2_105 installed from factory. Nothing else worked, it would fail to update the filesystem at /dev/sda with the new 2.1.2 & 2.1.6 roms from here.
Interesting the two parter works I wonder if the RDX Turbo would work for you now... Until they can fix the sound and some other stuff for now just a concept test and go ROM. There is China Smartphone with WM8505 MPU with OS 2.1 on it that's how they got the idea that it would work on these tablet. They didn't take into account the the PCB won't be the same.