Hiya. I got my head around it in the end. There are 3 different downloadable instructions with the V2. 2 of them are completely useless and don’t apply to the model..
Im still getting the strange high pitched hum? but after setting it up at robodogo and one of the lads from team Reality having a listen he didn’t seem to think it was much of a problem although did think it was strange. I have since brought another red brick and another motor for spares so will set those up too and see if there the same.