Making your own t-slot bolts

I don’t think I would go this far. First off I would have used threaded rod instead of cutting the head off the bolt, and then to weld a washer onto that and grind it down…Nice build but it has to be cheaper and easier to order these.

https://www.homemadetools.net/forum/diy-t-track-bolts-handy-jig-quick-proces-must-see-every-table-saw-owner-75053?homelistings#post140959