Parry Brima
Contributor
IMHO The AURI will only get the cheapo and the reliable one.
I'll drop here, my vote for Trache 1 and more used Trache 1
IIRC, Spain once offered their Tranche-2 to Colombia. So it seems it's not only Tranche-1 that's available.
I don't know much about technical differences between Tranches, so CMIIW, but is Tranche-2 the one that can be upgraded to Tranche-3?