I think I may have picked the wrong Dragoon 'Mech. The history is scattered and confusing. The Hoplite did get a C upgrade from the Dragoons, and a Royal upgrade from the Clans.A look at the fluff in Klondike could be helpful.
They need a proper family tree to put it all together. Indeed with the fleshed out 2600 to 2800 many 'Mechs need to be made clear when they are SLDF/Clan upgrades or post 3050 upgrades.