Having been the original owner of a swan 500c years ago back in the 1960s, I decided to revisit my youth and pick up another Swan to use as a main rig. However I wanted to upgrade the power a little bit and went with the 700 for the increased output. I found a rig and power supply on the internet, specifically eBay, and bought both at that time. I had them sent over to a repair facility to make sure they were in proper working order had upgrades made to the capacitors, diodes, Etc, proper alignment and then shipped back to me. I am writing this review prior to having actually used the rig, as it is in the repair facility at this time and will remain so for a few more weeks, so as much as possible I will answer questions on the 700 based on my extent of knowledge having used the 500 which is of the same build quality