Pat, a shame about that bow, but you are putting the material to good use. Yours reminds me of an Austalian Woomera, which functioned as a digging tool as well.
I love finger loops, but it is up to you. I agree, the spur is a bit high, but if it works, keep it as is. My favorite style is the basketmaker style, and with the finger loops, it lets me pull the dart up tight against the spur. I also like flexible atlatls, another feature of the basketmaker style.
Dane