Question. Did I mess up my first mini cone? Despite having watched video tutorials on making one of these, I decided that the top row of holes was too high and wouldn't be of benefit to the project...so I changed the design at the last moment.

Unfortunately, when I used it the first time, the fire didn't seem to be burning nearly as well as it did without the cone...so I went back and added the top row of holes. Now while burn times are improved, the middle row of holes has flames blowing out of them as times and I suspect that they serve little purpose.

Before I cut another cone, I am seeking input. Additionally, are 3/8" holes too big?

Thanks in advance.