Has anyone dealt with the models from 3m intech vs. Itero models? I have been doing work on the Intech models . Very nice. They are sectioned plus you get a solid model. The pictures for the ITero models look like only the die is removable. Is this correct. Does this affect the adjusting of any contacts? I have a doctor contemplating the 3M COS digital impression system vs the Itero. Trying to know all the pros and cons. Thanks for any info you can enlighten me with.