#62: VT1 Vane Relay. Analogue output re-scaled 0-25 mNm
#63 HVI Track CIrcuit Type added, but firmware still unreleased
#66: All variants: RS485 bugfix: Transmit data buffer could overflow causing data corruption.
#67 All varients: RS485 bugfix: Transmit data could be incorrectly encoded causing data corruption.
#68 All Variants: AoC bufix: Large AoC settings could be mis-interpreted and end up manifesting as a very small AoC setting on the VTi21
R80 Version number harmonisation across all VTi21 variants