I think you taken my comment wrong, I absolutely agree that seeking other qualified input is great.
But you posted a question that this is your first kydex iwb holster and also asked if it is built correctly. I think other have commented to some of the issues with your holster.
If you want to rock on with that holster and try to get it to work, cool, no body is going to lose sleep over it. But the brand that others and I have recommended are good, vetted, peer reviewed and have the consensus of serious users that it is squared away and will cause a lot less hassle then you already have dealt with.