Today I found out that my racquets were being strung differently by the owner of the proshop and by the employee. I found out that the owner used to add four pounds in the last pull to make the last knot. The employee used only one pound. I went crazy to say the least. The owner of the shop restrung both my racquets for free. Now I want to know what is the correct way of doing it. Do I let them use four pounds or one or what is the suggested pro way?