On Thu, 13 Nov 2008 08:13:42 -0800, Dave, I can't do that wrote:

On Nov 13, 1:15 am, James Waldby wrote:

You might see if the following works out. This procedure would put the
lower pivot point about 4.2" up and 1.8" in from the hinge vertex.

Hi James, you obviously think I am waaay smarter than I am.

Thanks for doing that but I really have no idea what all that means.
Just a good-boy old machinist here.

I had already found both the links though but thanks for searching and
posting them.

Do you have a C compiler? If not, maybe someone can compile
this program for you -- http://pat7.com/js/c/gas-spring-calc.c
or perhaps someone will translate it to a spreadsheet.

The program can prompt you to enter the necessary numbers, or
can accept parameters on the command line and use some default
values for others. For example, ./gas-spring-calc 13 21 2.2
produces:

With inputs 13.00 21.00 2.20 18.0 90.0,
the lower pivot is up 8.20 and in 3.61, and
the upper pivot is up 21.85 and in 2.20,
relative to the door hinge.

--
jiw