>As with all projects, there are certain problems. I contacted Orion, and >they couldn't find any 5.4" OD tubes that I could use for my scope. I'm >building a 4.25" telescope... Hi Ryan, Why a 5.4" tube? A 6" one will work even better, and you can get all you want from; http://www.hipco-ne.com/tubing.htm -Chuck