I've heard and have seen issues with the control board on this particular model over the years and I'm wondering if there has been any changes or improments since around 2005 or so??? I know where I work in remote Alaska they were abused from the users and from dust and we had two of these boards go out on two different machines. I'm starting a small fab shop in Spokane and would like to have the pulse ability with a decent cost. Will this machine last????