There is plenty of thickness with these that I found. At least when I got mine.
As for this project it turned out way too heavy for me. When I got it to low brace after some time and much effort I realized that this bow would likely kill me to try and shoot or if I managed to pull it back I couldn’t trust it not to explode on me. I may revisit this later but for now trying to pull back a 200 lbs bow is not what I’m after.