Here's a neat device that uses a spiral mechanism to convert a rotary switch movement into a push-pull cable movement.
Fits through a 11mm hole in any panel up to a maximum of 4mm thick. 54mm bezl dia.
Cable length 1 mtr. Maximum 34mm movement of inner cable. Inner cable solid wire 1.2mm diameter.
Requires minimum 200mm clearance behind dash if cable is to be bent 90 degrees.
NOTE: Do not overbend cable. Minimum 100mm bend radius.
SLIMLINE ROTARY HEATER VALVE CONTROL #HVCAB