Hi,

A pin hole in each bay (underside near the TE) is normal when covering with any of the films to allow the eapanded air to escape and stop it lifting of the freshly covered area, the holes are almost invisible. When I have a newly built/covered model I put it in my van in the hot sun for a few hours and then re-shrink the film. It seems to keep the film tight for years after this process.

Cheers,

Colin