Toki's are fun,
1. to determine the correct angle for the corners, incise the sides at the bottom of each corner, thread the main cord through the hole in the toki then wrap the thread around the toki and draw a line with the thread from the bottom edge of the corner to the first wrap around the main cord, this will give you the correct angle for the corner.
2. undercut the corners slighty so the thread hugs under them and does not slip off
3. drill and runnel the hole for the main neck cord so it is not noticeable
4. to get a nice snug fit without any gaps between wrapped cord and the carved recesses, test wrap often to get the proportions just right
5. Thread selection is important, too thick or too thin for the toki and it will look wrong
6. Use the same thread in the braid for the main cord
7. Have lots of fun
8. post your learnings here so we can all learn more
David