I looked for years for a copy of the instructions to my 521/ust stair template and was delighted when you posted them . I found the set of instructions I posted when I purchased some old Porter-Cable items at a lawn sale and found the instructions in the catalog. So I thought I would share as well. Porter-Cable now gives out a link to your instructions that you posted onlineHello Brian Casey, Welcome to the forum and THANK YOU for posting a copy of your manual! I wish you all the best and truly hope you find a home here.