I dont really have a Tonkin source. I was just able to salvage some from a leftover shipment that a specialty wood store brought in for flyrod builders.
I can second what Allen said about West Epoxy and their G Flex or 610 is very good for tacking and bonding in the metal parts.
I've also used MAS and System Three and they seem just as good and none of the three struck me as being very vapor offensive.
I always coat the inside and punch the nodes out. It seems a lot of the cracking of bamboo is because the disc of material in the node pries the culm open as it shrinks around it.
Get your culms cleaned out and interior coated and cracking seems to be eliminated.
I haven't tried them yet but I imagine System Three Rot Fix or CPS would be an even better choice for soaking Epoxy into the softer inner part of the bamboo.