This sub-forum has some experienced people who spent dirt-time in Brazil and other
likely places. They have posted pictures and Youtube links, a plenty. Do an internal
search for likely words, for example: machete
If an internal search does not work, do a google : bladeforums machete
I particularly like the Youtube of the guy (do not remember his name) who shows
how to make a small supplemental water filter. Does anybody know this link or his Youtube name?
{Edit: I found the link and name (Colhane):
http://www.youtube.com/watch?v=m8VQk4isaOM&feature=related
}
He had many good posts on machete use and modifications, also.
Jeff Randall (author of one of the books above) used to have a web site and forum
and he organized occasional trips for jungle training, mostly to Peru, I think.
You will have many more pictures on the web and you can make a detective game out
of studying them to extract the maximum info. Have fun, and good luck.