 Streetly Electronics was subsequently reactivated by Les Bradley 's son John and Martin Smith . After Les Bradley 's death in 1997 , they decided to resume full @-@ time operation as a support and refurbishment business . By 2007 , the stock of available instruments to repair and restore was diminishing , so they decided to build a new model , which became the M4000 . The instrument combined the features of several previous models , and featured the layout and chassis of an M400 but with a digital bank selector that emulated the mechanical original in the Mk II . 
