RE: 1st attempt at center serving.
Yep, congrats on gettin' er done... but you don't need any half-hitches in a center serving.
I would recommend buying Bohning's serving kit with the instructional dvd... I started to say you'll need everything included anyway, but it sounds like you've got a serving tool already. It is nice to see a center serving done properly on video though, where you can pause and rewind as much as you need to.