Thanks a lot
Deerhunter, I have made a lot of successful flutes.
Even most of these broken points that where laying under the jig had one successful flute on one side.
Does that count?
Really though, the ratio of points with two good flutes compared to failed flute attempts, sspeshully on the second flute, is not very good. I am learning something new all the time and realizing what causes a lot of the breaks. It takes several breaks for me to pinpoint what the problem is sometimes and sometimes it is obvious what went wrong, but a lot of times it just flat didn't work for no good reason at all.
I reworked my clamp arms last night and tried it out on this heated gravel slab. I kept the flutes short due to the material being heated and inconsistent textures.
Here's the first flute and platform for the second flute.