Turnover for Kingswinford-based design experts Mechatherm International topped £25 million for the year to the end of February. The record level of turnover was up from £16.5m for 2012-2013 and the company, which designs and supplies equipment for the aluminium and non-ferrous industrial sectors including furnances, casting machine and handling gear, has already got £20m of work on its books for 2014-2015.…