I had already built a MB909 tniner before, it took 4 years to build tniner, but i know why it was a huge job, in the end i use tniner, while nava him is often disassembled and repair . ^^
I think i was lucky, but i still lost part of my life trying to debug this thing. Worse still, a German user told me he had built 5 navas, 5 scrappy pcbs.
By cons i was happy with yocto V1, in my case nava was a disaster.
