Libelle Gap Sealing

Hi,

Has anyone bought 'Complete Control Gap Kit' from Steifeneder?
Are the supplies sufficient to seal both the upper
and lower gaps on the ailerons and elevator? Are the
instructions in English?

Also, does anyone have any informed ideas about using
the 'Combi' mylar (the mylar with the zig-zag leading
edge) vs. the curved mylar on a Standard Libelle? Is
there any benefit?

Any info would be much appreciated.

Owain