Be careful when you’re cutting the pucks…
I was about 7 when dad made it, and I remember him explaining how dangerous the radial arm saw was.
He either made a clamp which held the pucks to a board, or possibly screwed them straight to a board with 4 screws. Knowing him it was a clamp which took 4 hours to design, 2 hours to make, and was used for 6 minutes.
The apple doesn’t fall far from the tree.