I purchased a tdsz2 OSF kit from eco-cycles back in 2019. I'm only getting around to installing it now.... It came flashed with OSF software, I believe v.19, though I'm not positive. It has the 850C controller. I'd really like to be able to use the additional power modes, hybrid in particular because we have really steep hills around our town in Ireland. There are warnings in mbrusas's 860c version in github that the 850c is not recommended to be flashed with that version because of bricking problems. I believe that the version of the code this thread is dedicated to works only with the default code in the display -- and I believe my display has already been flashed with the v.19 code. Is there a way to make this work? Thanks!