Probably the neatest design I've seen for a Dob was a home made one at a start party. The OTA was sold wood and square. It held a 6 inch mirror. Nothing really special so far. The cool bit was that he had placed counterweights on the top of the tube. 4 of them on long threaded shafts. The weights had a couple of inches of travel and were heavy enough to move the balance point right up to the location of the eye peice. The focuser came out of the side of the altitude bearing so no matter where you looked the ep was alway in the same place. It just happened to be the exact height of the owner while seated in a comfy little chair. On the "driver's" side was an accessory tray that held all the standard goodies. It was made out of stained oak and had a pretty small footprint.
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A Nerd can figure out how long it will take the original Enterprise traveling at warp 6.5 to travel from Regulus to Antares.
A Geek will think he can use that to pick up a girl in a bar.
A Dork knows he can't pick up the girl with it, but will hang around for hours anyway, just in case she asks.
She might. You never know.
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