The reason for using the name foundation is that this base is built rather into the foundation of this mountain. The 3 highlighted parts are OPC.
Lookie here for previous version (http://i127.photobucket.com/albums/p124/flyingpeanuts/inf_Foundationsketch.png)
I would have continued on my merry little way with this map, but when playtesting it, found out that is was rather easy for Alpha to get into the base, even with nicely placed expert Bravo units. I suppose I should make more stuff between the little Alpha cover-structure and Bravo's base to give Bravo more of an area to defend, but I don't have the vision for it... What should I add?