Many thanks for this new information.
I already have a heavily modified v4 board here but would like to know what "add-ins" are compatible with the new v5 board?
For example is the NEC firmware and Nextion display useable on this board and if not what changes in code are needed.
I added an audio amplifier and narrow CW filter to the v4 board. I take it the audio amplifier addition is no longer required but the CW filter could still be used in the audio line before the final amplifier stage?
I look forward to receiving your replies and clarification prior to ordering another board.