I did a build/review on it, the PNP is pita due to the factory but the model is solid. You will need to check and probably remove everything with the PNP version. I did my own build and install but my friend here got the PNP and he found lots of issues and ultimately redid it all. I had the same experience with my only PNP model i had from them as well.
The Diamond back is a Bandit Models design that is being built in the T-1 factory. Feel free to check my youtube channel.
Its a gorgeous model and as good as it looks.