It looks to me like your bending nice through handle. Your right limb looks like most of it’s bend is about 5” to the left of the seam in your concrete wall. I’d put a “x” there and stay away from it till it evens out more. Left limb looks stiffer but mostly bending in same area. . Your outers look very thick yet. There is much less stress as you move out limbs towards tips. Your tiller needs to reflect it. The further out the narrower and or thinner it needs to be to allow it to bend.
When I look at my tiller, I look for straight areas. If it’s still straight and not bending. It needs wood removed.
Have you ever seen Eric’s “tillering gizmo “? It’s helped out a lot of people
Bjrogg
