Hey ranopaul,
I just got back from flight screening and can tell you that hotspots are a real issue. The best thing you can do is put your helmet on and fit it so its comfy, then go out to the lounges and wear it for like an hour. No one will care that you are doing this, they will know what your doing. Then after an hour if you don't feel any hotspots (or discomfort) you're good to go. If you do then get the guy to insert pads and adjust it and wear it again for a while and repeat.
I ended up getting a good recommendation but other guys on my course weren't so lucky. One of them had killer hot spots and took him like three flights to get it right. He said it destroyed his concentration (I had a small hotspot my first flight and it was even hard to concentrate with that). Who knows if the failure to embed lessons on the first few flights carried over and affected his ability to demonstrate his learning curve. I would definitely just take the time to set it up right and then you don't have to worry about it.
Hope this helps,
Jarod