they are tricky but can be done,,tried for two days it insert my springs without the rubber grommets forget it,, on one of my seats i had some Styrofoam stuff, hard but flexible, I rolled it up and stuffed it in place did it 5 times, cutting, re rolling before getting it to work. checked it 5000 miles later still there and working. if y can find the grommets to hols them in place you can get them in,,,on my other seat no problem jim