Hey, I see that you have updated the image with a render. It looks great. However, that breaks a pattern. From what I can see "X.png" for structures are always 64x64 and they use the icons from the crafting menus. For the built structures, a pattern like "X Build.png" (not 'Built', sad, I know) is used.
Your update created a problem with the Recipe template (because it basically assumes everything to be 64x64 size)
I don't want to revert to the old version (I'm not sure if I have permission to do so either), because it does look awful. Any chance you can extract the crafting menu version of the Palm Leaf Hut and update the image?