Thanks for the words of encouragement fellas
. I agree that I shouldn't just lie down, the younger me would've been at it straight away. But experience has told me there are battles you fight and some you don't. My time may have been better served elsewhere; I.e., my work.
Anyway, I went back this morning and he immediately refunded me. He said he would've liked to have had another go, but these things happen. He was very courteous and I left within a minute.
Happy days. More fuel to burn on a blast. Took it out yesterday after the alignment around some twisty country roads and it was amazing. It doesn't just pop on up shifts, it barks sometimes. Music to my ears.