Arkansas Sky Observatory - Cleaning Optics Here are some very good instructions and tips on cleaning your telescope and eyepiece optics.

 Building a Parallelogram Aluminum Binocular Mount More plans for building a homemade parallelogram binocular mount. This one is made of alluminum.

  Exercise in Collimation This site is not a full collimation "how to" site, but instead dedicated on the how to of secondary mirror offset collimation.

 Luxorion How to Select an Eyepiece A very nice, informative site helping you decide how to select an eyepiece by describing how an eyepiece works.

  Tectron Telescopes Understanding Collimation A good collimation site with plenty of easy to follow instructions and diagrams.