Sexy looking sculptured riser Canstikem....You are an artist!
Hopefully those risers are stiff enough not to flex too much, or they will crack at the back of the shelf from compression. Lighter draw weights will most likely be fine...
I'm not trying to rain on your parade bro....Good looking workmanship. But I had some heart breaking experience with those thin shaped shelf ledges /thumb ledges similar to that a few times. I was trying something fancy, and had to quit doing it.
I wish you the best of luck on longevity.... Kirk