Sling 4 aileron skin supplied by mistake

The correct aileron skin thickness for the Sling 2 is 0.4mm - the 3.10 inventory list is incorrect to state 0.5mm. The left aileron skin was found to be 0.5mm. This is actually a Sling 4 skin, but instead of being labelled .. L-C-0 (C = Sling 4) it has been labelled L-A-0 (A = Sling 2) so it has been mistaken for a Sling 2 skin from this point on.