356C seat upholstery question

[Greg Spreeman]

I see where the upholstery attaches to the bottom but, it seems there needs to be a shim, of about 1/4" to hold the upholstery to the seat bottom. How was that accomplished? In a previous build I used some 1/4" particle board cut to about 1/2" width. It worked but, how was it really installed?

[Martin Benade]

I think that the upholstery is stapled to a cardboard strip, from memory about 1/2” x 1/8 or 3/16”. Once it is in place the channel in the seat base is more or less dented in to retain the upholstery.

[Dave Erickson]

My 59 had little metal clips wedged in a fold in the seat upholstery.

[Doug McDonnell]

Greg There is a nice Youtube video of similar 911 seats being done: https://www.youtube.com/watch?v=3f8J0ml55GU&t=529s

[Bill Waite]

The factory used 5/8" by 1/8 " thick cardboard strips. The strips are thicker than mat board used in picture framing. The upholstery is stapled to the strip and it is then "flipped" and tucked into the channel. In order to accomplish that, the seat bottom needs to be compressed.