For now here are some pictures of the assembled device. Video that showcases its features will come soon. Assembly is made out of 3D printed body, smoked acrylic used as screen cover, back cover pcb, strap adapters for 22 mm strap, electronics and magnets.
Strap adapters fit snugly and don't wiggle. They can be removed by pushing back locking pin on the bottom of the case. Customized pcb that acts as improvised cover is attached by 4 magnets and due to two cavities on each side of the case can be easily taken off. Smoked acrylic is glued on front face of the watch to protect electronics inside.