Doug, Paul, you confirmed my thoughts.
In fact the one bungy cord I bought last night to try, I cut in half and I can
adjust the length/tension as it has holes in it with thick surrounds at the
holes. I am putting it (doubled) where the one stretched strap was. The other
straps look fine and have some tension, so I may just tighten them up a bit
more. Also yes, I do plan to add some extra heavy foam on the back next the
straps to help distribute the load and make the back firmer. One suggestion I
have heard is to replace the straps with a metal sheet, but I think that may be
a bit extreme.
Quick extra question on the head restraints. Looks like they are simply a heavy
piece of foam covered with a lighter piece of foam. Any idea what the correct
thickness of the heavy piece is? Looks to be about an inch or sofolded over at
teh top. Still have not taken it all completely apart as yet. I have some of
the thin stuff lying about from another project. I was going to place a full
back size piece of the same heavy foam behind the seat as explained above. May
even double it up at the bottom to give more lumber support as suggested.
Alan
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