Few people commented that the oval opening was a bit awkward for the front button, so I've made it a half circle opening instead.
It's much easier for me to cut and it should solve the problem.
I've been working on the new version ipad case bag all day today, as I could not leave the house nor use electricity.
Our electric pole started firework this morning, and cut the cable.
It's all fixed now, but my heart stopped beating when I saw the sight...