The results of my first build with this combination of Tzalam and Satine were very satisfactory: I ended up with a well balanced gun with no ballasting, which shoots like a laser. Since I had some more of this wood laying around I glued up another blank. I also have a couple of unused 5/16" shafts from an AB Biller gun which started to accidentally discharge every couple of minutes. Biller eventually replaced the faulty trigger mech. but now I don't trust the gun, so I will use the shafts in a new gun.
This time I started out by by cutting 7/8" x 1 1/2" inch rips of Tzalam, which I then ripped in half, then planed to 5/16" x 1 1/2". I glued 7 strips with West Systems epoxy, and added a 1/2" top sheet of Satine. After cleaning up the blank it had a 1/32" bow to it, so I planed it flat, then took it down to 1 15/16" X 2". The finished product will be reduced in height after the epoxy has a couple more weeks to fully cure.
My target is a 100 cm euro style gun with a shallow open track.