Don't remove the tail bracing wires!
The structure is poor back there.
The wing as built on the plan comes off the board with built-in washin.
And the suggested c.g. is way conservative.. 25%.. most fliers move it way back from there.
SIG took no notice of the difference in airfoil thickness between the root and tip when laying out the construction instructions.
When asked to explain, they came up with 'it improves "decoupling" ".. whatever that might mean.
I doubt wing root fairings will accomplish anything worthwhile at the speeds and manuvers the SE does.