Track Mounted Vertical Tie Down

I recently tried to buy some vertical tie downs for my kayak. Ordered YakAttack brand from Amazon. They sent me a paddle holder instead. I returned it and asked to be sent the right thing. Same thing happened again! I took it as a sign to make my own.For use with ¼"-20 track bolts like these here and ¼"-20 nuts. AssemblySlide the ¼" nut into the tie-down nut-slot. In PETG this was a bit loose. In ABS I found I needed to press it quite hard (i.e., punch and hammer)Put the washer over the boltInsert bolt into bottom of tie downAttach to kayak track and go!