I agree with most of your point Hurray but not only two there were six principle surname that was known as gorkhali or gorkhas, Pande Basnyat Thapa, Pant, Ghale and Gurung. The Gurung i mentioned here are mainly based in kaski region and the Gurung i mentioned in previous post are from Manag. This six surname were known as Cha Ghar Thar, even in Divya Upadesh they are mentioned. Why Pant was added because of Bhagirath Pant, Drabya Shah became King.
Then they were Tandons, Singh, Ale, Shah, Shahi, Kunwar . If you have heard about Ghambhir bahadur Singh while he was fighting with british his stomach was cut and all his intestine started coming out. he took a kachaura/ rikapi (nepali bowl) blocked his intestine coming out and sew his stomach after putting the rikapi inside himself. those were the fighters.
If you look now Rai Limbus, Manange etc are called Gorkhas and beside these people nobody can get the job. These people talk about nepotism in Nepalese Politics. look at what they have done. So why can they only escape? we should keep on with this debate.