Acquired materials:

LL Pro Fresnels
LL Pro Triplet
LL 65K t15 lamp kit
LL Pro reflector
17" Samsung Syncmaster
1280 x 1024 resolution
600 - 1 contrast ratio
0.264mm pitch
8ms response time

Built very large basic box for testing and getting measurements. Will shrink later once I know critical dimensions.

One stipidly simple question, how does one tell the difference between the field 650mm and condenser 220mm fresnels?

Take 'em both out into the sun. Hold them ring side up. Move the lens closer and farther from the ground. The distance between the focused point and the lens is the focal length. The one with the longer focal length is obviously the 650mm.