Most probably the best place for assistance on interpreting the manual or trouble shooting is on the Bottlehead Forum where you will find support provided direct from the Bottlehead team who designed the Crack and wrote the manual. I suspect some of us might interpret written instructions differently so getting it straight from the horses mouth so to speak is the way to go imho.
I hope you have enjoyed the build so far and welcome to the Crack club.
Thanks. I did post my results there a few days ago with no response, though it was the weekend. I'll have to be patient.