Practising double-splayed dovetails, used in plane-making.

[Philip Davies]

Hi Philip
I do not know if this will help. I follow a person on You Tube called Young Je who builds a lot of his own planes (and other woodworking tools) who uses this technique.
He also makes wooden planes.
https://www.youtube.com/channel/UC0R...KleJsEj2h5cPow
Kind regards,
Tony.

thanks, Tony, must be worth a look.