I acquired another VT Pro about a few months ago, the seller stated it had just been serviced and rebuilt, and included an invoice- by Huish. Prior to the change in ownership, VT Pro's were no longer serviced. The cost was about $175 which is more than used VT Pros go for on Ebay when you can find them, but there were some advantages including reliability and I noticed the buttons were a bit more responsive. Also the backlight worked! Lots of times it's the first thing to go on these older dive computers.