I have been trying to use a Heil PRO-SET Plus iC version with an Orion without success. Anyone on the reflector that can offer some help, it sure would be appreciated. Thanks, Bill --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.802 / Virus Database: 545 - Release Date: 11/26/2004