I also visited Idris a few times when I was on Argosys. With my total ignorance of the Italian language, I had always associated Castel Benito with Benito Mussolini and was quite surprised to discover that the NDB still coded "CB".
My worst injury in an aircraft happened one night when we left Idris to go to Luqa. It was very hot and very sweaty and I was wearing just my light-weight flying suit and a pair of shreddies.
There was a lot of Cb activity around that night and when the loadmaster came up the ladder with the tray of coffee and tea, we had a particularly good outbreak of St Elmo's fire across the windscreens. The young loadmaster had never seen St Elmo's before and he decanted the entire contents of the tray into my lap.
I was not best pleased and the future of my family resembled red tangerines for a couple of days thereafter!
Funny how you remember places!
Going back to the original query, I don't remember that much about Idris except wishing that we were just up the road with the USAF at Wheelus instead.