This is absolutely excellent. The head works well at this scale, even though it bears little resemblence to the original, and the leg assemblies are undiluted genius. The body, whilst plain, is very nicely done as well.
Shortly after you said you were considering a Stars Fenrakk, I was thinking "This will have to be really good." I'm not really that big on the head, it doesn't really remind me that much of the Fenrakk head as it ought to. The rest of it looks good though, the colors look good, and the build itself it pretty good, but I don't remember Fenrakk having spikes like that. Also, I was expecting a Fenrakk proportional to a Stars Vezon... all in all, I'll give you a seven points.
(Also, I feel your pain about the balljoints.)