#1) I generally just read the posts on this site... Good info since I moved from the Beer Capital (Milwaukee) to the 3rd worst traffic pattern in the USA (Washington DC area) and it's occasional bouts with hurricanes (last year).

#2) Fresnel Lenses can be gotten at most any book store, but I know of a great place for picking up "unusual" stuff back in Milwaukee. It's called American Science & Surplus (www.sciplus.com) and they got all kinds of fun stuff there, and quite a few items that would be really good in a PSK,

The OGRE