Hi. I just got the Series 3 Watch Nike Black version and I have some questions about it. I really loved the strap collection and colors of it. I want to buy lots of colors and different straps so I can change maybe day by day or at least once in a week. But I'm worried about something. I don't know the name of it but the thing when you connect your strap, does it get loose or become loose? Sorry for my language English is not my main so I'm confused about word or term selection. I'm really looking forward to your experience and answers. Thanks!