Great advice untill now, thanks. There isnt just a rule of thumb apperantly. Maybe I'm just looking at it like a exact science, which it isnt obviously.
I'll think I go for the hotter version with wrapping in tin foil.
@Pitmaster; I listen to anyone who has something to say, if I do anything with it is the big question. Every advise is appreciated!
@wampus the "oven paper" is something like this, we call it in Holland "oven paper", its a non stick paper u use in the oven to lie a pizza on it for example. This is what it looks like at my home;