threads with the "NGD" distinction are threads to discuss recent sightings of NGD, and to post pics from alleged sighting. as stated before, pics or it didn't happen.
The easiest way in general to post your own pics on the internet IMO is to open a free account at a picture-hosting website, such as www.tinypic.com. You upload pics from your hard drive to their interface, and they provide you with a URL for the pic. Then when you want to post a pic here at www.tdpri.com you click the little picture posting button and paste that URL into the pop-up window. Voila!
Actually, in his shop and mine, NGD always means "no good". Big Letters, Magic Marker. As in, don't use as a blank, but as blocking, perhaps a spacer or partial pattern. But don't use the wood or metal etc. in the airplane or car or whatever you may.