byounghusband, there is no doubt I learned from many on this site and others before I made this. A few specific acknowledgements:
Jay Fox, instructor at the Dublin, CA woodcraft store who taught the first/only class I have had on laminations.
ctEagle for showing what can be done with a tablesaw sled.
Sblake_l who posted a new sled design with changeable blocks for the differnt angles. VERY cool.
WoodKnots for the idea of making the Celtic knot in the first place.
Someone else I can't find who posted the rough outline for how to make them.
Alxe24 for the (indirect) solution to the problem of the knots changing lengths as you rotate and make the cuts (exactly match your saw kerf thickness with your filler) and for the idea of using the soda can for the highlight metal.
Thank you all. Without you and this site I would not have been able to do this.
Bjackman,
basically I was able to cut two pieces out of each soda bottom just using a set of metal sheers (I also used heavy duty shop scissors on one of them). (Soda can bottoms are only .0125 thick.) Once cut to size they were "close" to flat. I then hammered them with my dead-blow mallet on the flat of my vise. It got them "closer" to flat. They never did flatten perfectly but it was close enough that clamping and glue were able to hold it. By the way, I just used (lots of) medium HotStuff CA to glue everything up. Epoxy or Polyurethane glue would have been better but I'm not that patient.
GK