Well worth doing as It adds SS wire TC support which is working perfect and the screen is a lot brighter, much easier to read.
You will need a "ST-Link V2 STM8 STM32 Programmer", micro male usb plug and some skill with a soldering iron to make the lead.

Instructions can be found here : https://docs.google.com/document/d/1...1Mg-jOdkc0/pub