welcome,
im new to this site as well.
i think you mat snap your rod at 4kg when bent over,before your 20lb braid would break.assuming you may hook a fish capable of breaking 20ld braid.
or;
i mean to say a small plate fish may not damage your rod,just be aware of snapping rod before your line if you bully a good fish
edit;;im a little weary n overlooked that youre using a light leader,probably you are for the above reasons
natho