Thanks, Mickey.

Yes, the cling film. I've tried about twenty times now. Takes several attempts to get it tight enough all around. Drawing the outline is okay. But the tape is a pain in the ass. Might get the first couple of bits on, but one inevitably comes along that has a big crease in it or such and I have to start all over. Driving me to despair, I'm not sure how other people find it so easy.