That link goes to a page with a link to the build instructions, right? Unless I missed something, I'd say don't bother. The instructions say you can build one for about 12 bucks, but on eBay you can buy one WITH all the hoses, clamps, mounting bracket, etc. for 12 bucks.

Here's a link http://cgi.ebay.com/ebaymotors/R-TURBO-BOOST-CONTROLLER-MIATA-MX6-RX8-Mazda3-RX7-Supra_W0QQcmdZViewItemQQcategoryZ33742QQihZ006QQitemZ160308791715QQrdZ1QQsspagenameZWDVW

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1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown