Eric de Jonckheere (a fairly new members of SLAS) will be at SPOC this evening with a 22" Obsession dob. He'll also be bringing an Argo Navis digital setting circles system (http://www.obsessiontelescopes.com/accessories/ArgoNavis) which he is trying to install on the scope. He is hopeful that someone will be able to help him get the system working. If you think you can help please contact him at edejonckheere@gmail.com. patrick