I too have fallen in love with the half circle Folded Christmas Tree.
I have been experimenting this morning with cutting circle swith my cricut.'
I have always known that when you use the "George" cart and choose the circle that the dimensions are not equal. If you choose the circle and do not change the dimensions, as an example I choose 3.71 and the other dimension comes up 3.46. I am finding when I cut the circle and then in half, and fold, the bottom edge does not look even, it seem sto slope at one end. I have looked at a lot of examples in google image and there seems to be no slope in most of them.
What I want to know is what do you use to cut your circles? And if you use your cricut, do you change the dimension, so they match. I have tried this and it does not seem to matter, still getting a slope. Maybe I am too picky.
Also I found that this template works very well for folding. It is from Connie 'Babbert. I cut mine out, and left maybe 1/2 edge around the circle, and laminated it. The sticky from the mat, keeps it in place for folding.
Anxious to find out how you are cutting your circles and about the bottom edgte, maybe I am too picky. I have been doing a little creative trimming wiht my scissors.