Picture of Turnbuckle Mini Jacks
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".

Step 1: Materials

Picture of Materials
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
knife1412 years ago
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.
Those look really useful, thanks for the idea.