I have a couple of bamboo didgs too, they are real tough. Obviously hollow too to be used as a didg.
The apparent joints along the bamboo are like cells, they are blocked off when its growing, I understand and need to be knocked through and the pulp removed from inside if you want it as a tube.
Shouldn't be hard to find a prepared length tho, garden centres, shops selling it as didgs too!
I'd love to see the finished result for sure!
Iain
Bookmarks