jacks.jpg
Here is a quick how-to on building turnbuckle mini jacks.  These are surprisingly useful little things and can be made in minutes.

The version I built can be any length between 9.5" to 12".
 
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Step 1: Materials

turnbuckle.jpg
solidrubberstoppers.jpg
parts.jpg
You'll need:

a turnbuckle, I used a 3/8" from Home Depot
two rubber stoppers, I got mine from a chemistry lab supplier
and a long bolt with the same threading as the turnbuckle, I used a 6" long 3/8" bolt

You'll also need the following tools:

a hacksaw
a drill
knife141 says: Feb 7, 2013. 6:22 PM
Nice design. I use something similar to this to hold up the "lid" on some typewriters when I'm working on them. These can be very handy.
freefall2023 says: Jan 30, 2013. 11:44 AM
Those look really useful, thanks for the idea.
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