Hello Andrei,

Thanks for proving my point. I didn't even need to run the analysis to see right away that you have continuity defects, they are that obvious. It's clear that the red and green profile lines are not identical. If you're wondering where they are I have attached the analysis screenshot that the software spit out. Interestingly the original file has no continuity defects (I did fix the one naked edge in the back, didn't touch anything else). If any modifications need to be made you are going to have a horrendous time trying to acquire required continuity with that surface layout of yours, it's definitely not an improved clone of the original.