I've taken on board everyone's kind comments above and I will seriously consider looking at the Revo map in the future.
In the short-term I've decided to pay off the outstanding balance of the other halfs 1 year old C1, so that's one car now paid for.
I might speak to the Revo agent in Blaydon and take a trial to see if the same problem as the BF exists or not.
If I'm happy with it I may consider getting it done March/April time.