This is a really great design, both in form and function. I made two small changes to get it to be the perfect thing for me:

1. Made the entire model 10% larger. Longer incense sticks had ashes spilling over the sides. This fixes that issue.
2. Increased the diameter of the hole that holds the stick of incense to 3mm (about 50% larger than before). I like for the sticks to drop into place instead of getting my hands messy by press-fitting them, and this makes that happen.

Thanks for the awesome model!

Note that Thingiverse's image resizer is currently broken, so the pictures I uploaded are not displayed correctly. I don't think there's anything I can do about that. This site has been broken a whole lot lately, and that makes me sad.