charles, you just need to practice more.
you should see my points from this time last year
thats how i got to the level i am at,which really i am not all that good.you should see the ones i never take pics of.
i have only been knapping for a year,but i try and get atleast 2hrs a day in as a minimum,somedays especially in the summer months.
i will spend 6-8 hours knapping outside.
its like they say "knapping is a hobby of tonnage".you gotta go thru alot of rock to get decent and and even more to get good and even more to get great
this one was made from the slab that you had already turned the edge on.i looked at that and asked my self why you gave up on it.
you had done and excellent job turning the edge.
one of the biggest issues newbies,including myself when i started,have especially with obsidion is not abraiding enough.
if you dont abraid the edge enough on the glass type materials then you just end up crushing the platforms and that gets frustrating.
if i were i wouldnt give,just keep flaking away youll get the hang of it.its like the old saying says "how do you get to carnegie hall,practice practicce practice"
same goes for kanpping.good luck bro