With all due respect, dear tendriver, but I think
#205 and
207 say it all because this is a truck navcore topic and the solution given by
steve uk works for the truck navcore where as changing the modulations (as you would succesfully do in other navcores(!) ) did not work in the specific case of the truck navcore and map.
By the way, I even believe that, before the crash, apart from me, both you and downunder thanked steve uk for his tip/trick/solution. But I may be mistaken about that.