I bought a three phase only cst250 on craigslist, however when I got home I realized that it is listed as 50 hz only as well. Is this some kind of foreign market machine? I usually have access to 3 phase power at work, but it is 60 hz. Will this machine work for me? Did I end up with a lightweight boat anchor? Also, I have never seen a 3 phase only cst. Any chance machine will run on single phase power as well without consequence? Btw the stock# is 907052 and the serial # is EVAL 35.