I am planning on making a projector soon. I have the 15" Samsung LCD, and a 250 metal halide lamp/ballast (bigger type). I am looking on getting 2 fresnel lenses but i dont know what size to get or if i need split fresnels or does it matter? And i need a projection lens. Im not sure what lens to get but i dont want to spend so much money and buy the ones from lumenlab or diybuildersgroup and all those sites who are charging an arm and a leg. Also, i am from Canada so it would cost me a hell of alot more. About the projection lens, i dont know what focal length to get. Im thinking i want about 4 meters from the lens to the screen because i want the projector to be behind me. But if it is that far away, will i lose alot of light? Lastly, are there any good plans out there that dont cost any money? Even if somebody could help me out and send one of there plans, i would greatly appreciate it.