Universal sharpening jig. By JSK-koubou. 13:08 video:
https://www.youtube.com/watch?v=_Gl4Y--5C88
Previously:
https://www.homemadetools.net/forum/...510#post170098
https://www.homemadetools.net/forum/...294#post169346
https://www.homemadetools.net/forum/...197#post169028
https://www.homemadetools.net/forum/...653#post167064
https://www.homemadetools.net/forum/...603#post166899
https://www.homemadetools.net/forum/...009#post164541
https://www.homemadetools.net/forum/...983#post164453
https://www.homemadetools.net/forum/...892#post164063
https://www.homemadetools.net/forum/...788#post163703
https://www.homemadetools.net/forum/...145#post161059
https://www.homemadetools.net/forum/...875#post160028
https://www.homemadetools.net/forum/...420#post158429
https://www.homemadetools.net/forum/...006#post157033
https://www.homemadetools.net/forum/...743#post155907
https://www.homemadetools.net/forum/...461#post154812
https://www.homemadetools.net/forum/...994#post153124
https://www.homemadetools.net/forum/...881#post152611
https://www.homemadetools.net/forum/...726#post152049
https://www.homemadetools.net/forum/...498#post151231
https://www.homemadetools.net/forum/...376#post150752
https://www.homemadetools.net/forum/...246#post150109
https://www.homemadetools.net/forum/...733#post147998
https://www.homemadetools.net/forum/...644#post147625
https://www.homemadetools.net/forum/...003#post144992
https://www.homemadetools.net/forum/...457#post142766
https://www.homemadetools.net/forum/...723#post143744
