OK I did a quick mock up and it is still drying so will post photos later in the day but to this point, Ken is correct again. Having only done about 5 or 6 knots in my pen turning career and I usually follow the no cut through rule, I was not sure about this statement. Nothing like trying the experiment yourself. The kerf infill material must match the kerf of the blade. No matter if you cut partial way or all the way through. That now has been established. What happens and I saw on the second cut right away, is that the ribbon or infill material do not line up when joined back together. It is not that the knot is off center it just not there. When I post photo you will see exactly what I mean and I also may even turn it round to see the design. Who knows maybe it would be a new design. I will also show a photo of my glue up set up and a little tip that will help if doing any segmenting work where clamping needs to be done. That will be my wrap up on this topic. Learned a few things and hopefully added a few things that may help. Been a long time since we had an exercise like this here. I did this on the UK site a few years ago when I challenged them to figure out the changing color in the knot like I shown in the red and yellow sierra. That struck quite a good conversation and experimenting. The groans after the secret was revealed were heard across the pond. Anyway till later happy turning.If you cut all the way through then there is no kerf per se right? As long as all of the infills are the same size it shouldn't matter should it?