If you are interested in longboard construction check out
Toothless Longboards or
Silverfish Longboarding. Both sites are the definitive guide on longboards.
On a side note, thanks for mentioning my site...
DIYskate.com, I always appreciate a referral.
By the way, the cost of steel has risen, at least in Illinois, since I have written that article, so you may find the press to be a bit more expensive now.
Good luck,
jason - diyskate.com