Of course, as the round workpiece neared the end it became more difficult to cut short sections without the blade hitting the end of the holder. So early on, in fact before the square holders, I started using these steel L-brackets with a 3/8"-16 bolt to hold the rods in place. The back of the bracket would be clamped to the back fence.
The 3 is the diameter of rod this is for cutting. Each cut, I loosen the clamp and move the workpiece further into the saw blade. Of course this requires drilling and tapping a 3/8"-16 hole in the center of the rod.
The new Ryobi does not use the same workpiece clamps.
Finally, you will notice the back fence on the right has a ruler, somethiong I had to add to the old Ryobi.
This is not quite as accurate as what I had created on the old Ryobi. It tends to cut stuff about 1/16" too long, but I can compensate for that.