Ken, I don't think Embraer need to have Mr B hold their hands on world wide support - they already have facilities world wide for their commercial aircraft.
Worldwide commercial support and worldwide military support are two very different things. Embraer's military support infrastructure is pretty limited. Boeing can make a big difference there. Also Boeing can provide Performance Based Logistics. Which is to say, militaries pay a fixed fee for X mission capability rate at Y utilization rate. Embraer cannot do that.