I wanted to show what I did here.
The problem: as you know, there is no HL link to buy and I only got a couple with a defect. Someone had shortened one end link with the milling.
First I made an impression of the intact part

then I restored the missing area in plastic

this piece, I have casted into steel

polished and glued at the link

I did not soldered it , because I worry about the steel material of the link
maybe sometimes I would have it laser welding, which can be done later
I think it is not substantially noticeable at the watch

! but if someone will offer me an original HL link , I will be glad to buy it !!

cheers
mich