GEKO handsticks -- Knot?

[cloggingfool]

I just got some GEKOs, and the string that was pre-tied was too long for me. I've tried tying a new knot at the length I want, but it was too skinny and slipped out of the stick. I tried a bigger knot, and it wouldn't fit into the the little "knot spot."
What knot will be fat enough to STAY in, but skinny enough to FIT in?
Thanks in advance,
Cloggingfool

[wgm]

k i've never used those sticks but i've had the same problems with other sticks that work like that. what happened to me was the fat knot didn't fit in right away, but after a few hours of diaboloing the pressure on the string pulled the knot tighter and made it the right size.