Gustavo,

I'm curious which of the gliders you decide to build. I own a
Woodstock and a BG12 and friends own Duster and another you should
consider, the Cherokee. My personal favorite is the Woodstock. It is
amazing. It was the latest design and benefits from the earlier
experiences. They are all wood but otherwise different. Each type is
fascinating and fun. It is difficult to get plans but not
impossible. Cherokee plans were recently on Ebay. The very good
Woodstock website that had photos and stories of my glider has gone
off-line unfortunately. Hopefully someone will get it back online
soon. It had a lot of good information for Woodstock builders. My
friend Tony the "Cherokee Kid" on this newsgroup can tell you about
the Cherokee. There is a BG12 group on Yahoo. Cam Martin on this
newsgroup is the Duster expert. You can also get plans of many
classic vintage gliders from the American Vintage Sailplane
Association. You might be able to build a reproduction of an older
wood glider from those. Good luck. If you come to my gliding club in
Iowa USA you can fly the Cherokee, Woodstock, and BG12

Matt