Hi all, 
Back when I got started on all this, I picked up a serving jig.  It's plastic, red, OK as these things go, I guess, but it doesn't let me serve strings near as easy as I see done about.  It is real hard to keep tension right; it either winds the bow string up tight, or slips and drops on to the table, losing all the wrapping I had up to that point.  Usually both.  I figure I'm not holding my mouth right, or there's a better tool, or both.  I'd be happy to hear your suggestions or recommendations, PM me if it involves branding, please.
As always, your wisdom is greatly appreciated,
Frode