1 mm is fine for thickness of the zebrawood “veneers”, but I always include the thickness of all the laminations in my calculations. If you built a recurve w/o veneers which turned out good, and then add veneers without accounting for the extra thickness, you’ll have a bow for Hercules, and will need to start over.
Also, zebrawood is pretty porous, and will soak up the epoxy before curing and leave you with very small glue voids that show up under the clear glass. Use plenty of epoxy and heat and apply pressure slowly. This is mostly a cosmetic issue, but annoying.
I’ll check back tomorrow and see if you have more questions.
Gregg