I've got a Sub Ray 4 in my arsenal, and I think it is a really great bang for the buck. To get one for cheap is even better.
As an inveterate fixer-upper, I am very curious to know: how deep into the neck was the truss rod?
I was toying with the idea of slimming down the neck on mine, about 1.5mm, maybe you can clue us all in on the internal construction of the neck!