Thanks for the feedback. Yeah, some are a bit chunky, but since my arrows are rough leaf dogwood shoots, I have a little more room to mount them. I have mounted a few made out of thunder chert and they seem to be holding up well to repeated shooting.
And thanks for the ordering info! I am excited to trying this style of knapping out!
I found out tonight while working some raw chert that they should work this season... On the final pass, the flaker slipped off platform and sliced my index finger up to the knuckle... Just another blood sacrifice to the rock gods!