Here's a .pdf file of the file that was sent to me, complete with photos of his press and description of how it works. If it doesn't open automatically, you may need to download the free Acrobat Reader from Adobe.
free press plans
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Nicely done! 
Cheers!
Cheers!
Here's a quick schematic of how it worked as I remember. You're looking down at it from the top, there's an "L" shaped piece attached to the top of the screen to intersect the Left/Right "micro", and the frame butts up against the two "Front/Back/Skew" "micros at the top as well. The micros are all attached to a piece of square tube stock, or a piece of wood and t-nuts could be used. The "Micro" bolts all should have locknuts to keep the bolts from moving once registration was achieved. The shirtboard is underneath, and I have to assume that off-contact is probably achieved with shims attached to the screen frame underneath and rest on the shirtboard. Needless to say, registration will also depend on consistently pushing and holding the screen up against all three micros, but the guys I've seen in the videos really move along snapping those boys in there.
Attachments
Here is a basic illustration of how a frame is registered on a line table system. The black outline, called a guide rail, is usually a steel angular bar about 1-1/2" on both sides. The gray on the middle of the guide rail is called a registration stop or stopper. The illustration shows a 4-5" nail but often, they are screwed onto the quide rail to allow for micro adjustment. The bluish "T" on the frame is the "T" guide, centering guide or the vertical registration. Just think of a "T" bracket or a "L" corner bracket. Film positives are pre-aligned for this to work but some, like me, use an adjustable guide for micro-registration. This is the first contact point for a line table registration system.
The 2 small yellow circles at the end of the frame (on the side where the "T" guide is are simply eyescrews. We normally use #8-10 eyescrews. The two screws are adjusted up or down for horizontal alignment and represents the 2nd and 3rd contact points to complete the 3 point registration system of a typical line table system.
Some discussion can also be found here http://www.t-shirtforums.com/screen-printing-equipment/t123221.html
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