I think you did very well, and lots have made this box on RU-vid. This is a good build and smart to make your own. Take no notice of others negative comments.
I came to learn the trick. But I must commend myself.... That I have been learning so many trick, that I immediately saw the flip even though I wasn't looking for it.
What frustrates me the most is how whenever I do a pinkie count or a thumb count they come in a clump, so instead of getting two cards I get three or four. Or another thing Is how the cards are angled to the right and I can’t bend them to count.
I bought a lesson from Mr Hondo himself on how to build estra thin flap card but he sent me a private CD ROM and haven't found a device to play it they told me that I needed a computer setup and I still haven't got one.
kleiner Tipp: die Paper von GIZEH kommen in einer Verpackung mit einem kleinen Magneten und einem kleinen flachen Metallplättchen. Das würde sich super anbieten