Very good and caring seller! Don't buy your windsurf gear anywhere else, because this is probably the best seller. The material of the Aliexpress tendons looks to be very good (tested it approx 7 times now). The holes in tendons should be drilled more precisely in the middle of the tendon. At the momenbt this is an important problem that is easy to be solved by the manufacturer. For the safety at sea the holes should be in the center. Very quick delivery!
I put it on the NS slalom joint. Hope it is strong enough for slalom equipment.