We have also added a pretty neat form of technology sharing, building units under licence. You can buy the right to build units from other countries at their technology and practical experience level but with your IC. When the unit is complete you gain that model type and name (until you upgrade it) and increases your own practical experience (which will assist your own research efforts in the future). This costs money but can be money well spent. Of course, these, as well as expeditionary forces retain the model & tech names of their origin, until upgraded.
Hmmm... i wonder if this licensing bit can help model Lend-Lease more realiatically...