That looks awesome. You should be proud of that sweet and historical rifle.
I had an upper hand guard just like that on a 1966 Romanian RPK kit - broken in the exact same places and split into 3 separate parts. I tried several methods of gluing it back together from the underside, but the slightest amount of pressure always ended up breaking it apart yet again. Never could get it back onto the gas tube in one piece. Gotta admire a piece of wood like that, though. It gave all it had to The Cause.