Knife Sharpener jig

I have this knife sharpener from AliExpress (link below) and it does a good job but I needed a way to ensure that the knive's blade is at the same place (and consequently the file angle) every time the knife is sharpened.
So, I designed this simple jig that is used when mounting the blade in the sharpener's jaws. With this jig, the blade's cutting edge angle is accurately maintained and as a result sharpening is efficient and precise (only needs a few passes of the 3000 grit file per side)

This is the sharpener: https://he.aliexpress.com/item/1005006964504625.html?spm=a2g0o.order_list.order_list_main.436.4a851802nKkkFO&gatewayAdapt=glo2isr