I've got an early '99 SE, and mine has the driver side option...they took that out? I'd think it would be more expensive to make the engineering change than leave it in for the last year of production...
Also...I did the fix as Ray suggested it about 2 years ago, and it worked perfectly the first time...and ever since. Did it too on a friends '99 and it worked right also...forget what size hole i drilled, but it was the Ray suggested starter size. I also took time to completely deburr and make sure the copper piece was clean before I inserted it, to eliminate any weird airflow issues.
Don't forget to let your computer go through 3-5 complete drive cycles before adjusting things further (unless something is really wacky) or you'll drive yourself (and your computer) nuts.
