How does the cost of building, say, a 6, 8, or 10" Dobs compare to buying one? It looks like I could get an 8" from Orion for under $500 - do the dollars make it better to build, or is the advantage more in the intangibles? And what about the cost of buying a finished primary vs. grinding a blank? Harry Boswell hboswell@netdoor.com Home Page: http://www2.netdoor.com/~hboswell