Kiting the Sting

So for the last couple of days I’ve been taking Monte’s wing out for a little high wind kiting. It comes up good but I’m having a hard time finding the right brake input. Either it wants to overfly and tuck or I’m using too much and the trailing edge puckers and the wing falls back. I’m not sure if it was a combination of trim and wind speed or just the nature of the wing. I think the lines are strung different because it’s a tandem wing.