Cant you make a small line with an abrasive tool on the metal and use a reflective measurement system?, or perhaps add a small mirror to the painted surface? Mauricio D. Jancic -- Outgoing mail is certified Virus Free. Checked by AVG Anti-Virus (http://www.grisoft.com). Version: 7.0.205 / Virus Database: 261.3.3 - Release Date: 02/12/2003 -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads