Ok here are my 2 cents. As a person with a vast background in manufacturing, what I think I am seeing are revision changes and improvements to their components that are likely caused by differing contract dates and multiple suppliers of parts and or finished assemblies. That being said, I must say how impressed I am with the quality of the unit I bought. I took it around the shop and the guys were impressed with all the machining. I hate to think what the poor souls making these actually make for a living, nor do I know their cost of living, but we all agreed that you can not make it here in the states for that cost, closer to the Provari if not higher. I am repeating my order from fasttech tonight.
i got my SVD from fasttech last week... and while it has okay build quality, it's nowhere near as good as the Provari. the SVD still has a rattle and the threads are very crunchy. plus SVD's have an issue with the contact connecting with cartos and such. Also, there was pretty dirty when it it arrived in the box brand new and had scratches/knicks all over the little ring that the collar ring sits on top of.