It can be done but is a real pain in the neck. I have a scan Eco as a back up unit and am unable to load Exo onto it or the thing goes **** up. Anyway its all to do with the file names so you need to know what name Exo gives to upper and lower arches and the individual preps. Once you have the correct names then just scan the upper and lower separately and the individual prep scans and name them all up and place them in the saved exo database file. Also put the upper and lower together, use an elastic band if you have to but make sure they can't move. Now mount them on the scanner so the posterior of the upper and lower is touching the plate/scan base. Now do a scan and save it to the desk top. Go to CAD for you upper/lower case and let it load all your scan files, now turn off wizard and save it so it restart at the same point. Now right click and choose Advanced and select edit/add files and then choose the option to add visualization mesh and click add it will ask you where it is so just click desk top and click the upper and lower file you saved to it. It will introduce the image of your upper and lower together as you scanned it. Click OK. Then right click register mesh and register your master scan of the upper to your visualization scan and do the same for your lower and your preps. Then turn back on Wizard and run as normal from there. Like I said it is a pain but really does only take about 2 min to do. It works great and its the only way I have been able to introduce two arches with restorations on both at the same time. OK my head hurts now, have fun Pete
