No, I haven't ^^ But no worries, as I said I did take the trip to T Tauri, sold data there, got Allied status, and then went back to the megaship and got my permit.
The regular gauss cannon is better for AX @Marval. The salvation Shards and Plasma Chargers are better than standard. Getting the Mbooni permit is detailed in this thread, so read backwards
The salvation weapon cost is per each weapon, so it might be quicker/easier to unlock the guardian weapons. I did not realize the cost in guardian weapon blueprints for the modified weapons until I checked. So I unlocked the guardian gauss instead
I started AX with the AXI KMKII scout build, which uses AX multicannons and it worked fine. I am building a Chieftain for Cyclops' now, build also from the AXI website.