I am looking to get a nixie clock repaired. The clock itself is in great shape and the nixie tubes are all good (I got the clock on eBay), but it runs too slowly. I believe there is a bad potentiometer or something. There is an adjustable pot for the speed, but it is ineffective. The clock is this one: http://www.mapsevoli.com/. I live in Chicago (USA). Any ideas on who can repair this? The manufacturer has been unresponsive for nearly a year, but before they went AWOL they suggested that a shop could repair it with a couple of hours of work. Thank you!