Here's a translation of the tettra guide from japanese by kobayan, our japanese member.



This is a guide jig to cut the groove of hinge. The thickness form of the rudder board is effective even in the wedge shape.

Usage
1. A rudder board is put into the top-bottom plates and restrained as shown as DWG.
2. Cut a groove with the cutter knife along the central guide board.
3. A central guide's height position is fitted to the thickness (0.45mm) of a knife on the market.
4. When top-plate of jig was put on the upside of rudder board and a groove was cut. Even a wing side is to put top-plate on the top to be the same, and cut a groove. Then, each other's groove position becomes accurate.
5. A central guide doesn't sometimes reach when a groove is cut into the end of the wing.
In that case, write a mark with the tip guide, and meet a mark, and cut a groove.