What is described below is what works for me. There are alternatives such as the elegant one described by Chris Cunningham in his book on Building the Greenland Kayak.
At the stern a block is also inserted due to the wide angle at which the gunwales converge.
The trunnels are cut from a die. Normally the wood-stock is held firmly with the other hand as it is being hit through the die to stop it bending and breaking. I use oak for strength. (you can alternatively buy hardwood dowel)
Finally with this kayak, which is being built in tandem with updating the computer design, the sheer of the finished structure is measured using a laser level, and then the design in the computer will be updated to reflect the actual sheer measured.
Two raised deck beams still need to be added and can wait until a later stage in construction. Pinning the tenons will be shown in the next post.