If you have an S1 or S3 digital pre 2010 and the control has a splined shaft not D shaped please see https://www.ebay.co.uk/itm/325690827768
About Me: A Radio/TV/Audio engineer for 48 years and a service agent for Sony, Philips, Toshiba, Panasonic etc etc. Closed my shop and started selling and repairing Electric golf trolleys. Visiting 30+courses in Sussex and Surrey a service agent for Motocaddy, Powakaddy, Gokart and more for 10 years. Now retired I make and sell On/Off speed controls, encoders and front axle kits, as I get asked for new product I try and source and make them to order and to sell them here. Over the years I had to make controls for many Chinese imports that had no after sales support.