I made a video guide on restringing my jointed hands for my customers.
BJD dolls, as well as jointed hands, should to be restrung every now and then to keep the proper elastic tension. Mine should be strung in a not-so-traditional way, so you can restring your pair of Whispering Grass jointed hands on your own.
All new items are now in Telegram: WGrassBJD channel!