I've turned that anoying yellow shift-up light into a redline shift light. I used an rpm switch to trigger it, it works great. More details on my website.
Eric's Saab Site - Redline Shift-Up Light (http://www.lehigh.edu/~erp4/saab/Upgrades/ShiftLight.html)
http://www.spacespider.net/emo/whacky12.gif
Eric

In my 9-3, the light comes on at 5800 rpm at WOT. To me that is good enough. Does the 900 not do this?