I like how you made this riv-nut tool. I need to make a similar one for my home shop.

I have used the spin-spin pneumatic tools and also the spin-pull pneumatic tools at work where we put in a lot of these parts. Many hundreds of thousands per year. The spin-pull tools are much preferred as they spin the nut onto the tool, and then pull to actually set it, and then spin to release. This enhances tool mandrel life and the threads of the riv-nut are in better condition too.
For reference, the product tools cost anywhere from $2000 to $10,000. But they can set a nutsert in about 10 secs, all day long.