very nice indeed. I guess some amount of glue would be needed to have a tight fit and that may have ben natural glues in the past or artificial ones now.
I am not much of a DIY but enjoy these things (at least seeing them) ,unfortunately specific information on the manufacture of anything kris related is very sketchy and for the most part in local languages.
this is a video about something else but the wrapping technique ( especially the way he closes the wrap) can be very useful as an inspiration (it would be nice if there would be a way for this forum to embed videos so that they can be played directly )
https://www.youtube.com/watch?v=BnWD58gWY10