we stopped going model-less all you've done is add way more headache to your QC. Crowns can be mixed up esp when you end up with 6-9 #12's all sitting there. Dr loses the box of crown - which you in the moment just remill and resend because "what the hell we didn't waste any more time"...but it happens more often than you'd like Dr somehow feels it's of lesser quality...... yeah still scratching my head on that one. We have a Carbon3D printer and a few Form2s, we print a small contact model for each case now and we don't offer a model-less discount. The Dr's who have taken the time to get their Trios up and running really well have saved money on their impression materials and chair time, and most understand that because we have spun our discount removal to mitigate any problems that may occur during case delivery.