This 120mm fan hole template was created by cactushead from moddin.net and has been graciously licensed to us to use for aquaria.

The file can be downloaded from this link:
moddin.net template - DIYreef.org - 2x120x120 ver 1.7b.pdf (193.43 Kb)

Instructions how to print the template to the proper size are on the template itself.

You can still use
these templates using Photoshop but you'll have to do the following
tweek to get them printing out correctly:

1. First go to Image then Image Size...
2. Then take a note of the pixel dimensions at the top - it should be square so you just need to remember one of them.
3. Now change the Document Resolution to pixels/cm
4. And change the Resolution to 100
5. The top two Pixel Dimensions should have changed so just return them to the original number you noted down before
6. Now just print out and all should be correct (fingers crossed)




You could of course do the same as above but keep the Document Resolution at pixels/inch and change the Resolution to 254

Also remember to go into file and then print options
and alter the top and left postions to 1cm (or something similar) so
that you can save paper and get several templates out of one sheet.


References
Fan Templates