In my opinion, 2 things. 1. your own existing hairline is to thin to match up against the piece's hairline. One solution would be to graduate the pieces front hairline even more, I mean on your next order specifiy a very graduated front hairline. The second thing is that your next piece should be without poly in the front. Poly allthough very good for durability and for ease of detaching and re attaching is the worst thing for hairline visability. Probably get a regluar french lace with poly sides and back with the new ultra thin swiss lace front. Since you already have someone that does the attachment for you, they should know how to blend it in. The best of luck to you.