Here is a little update wih my progress 2 weeks after the operation.
I am now down 10.1 kg (22.3lbs) since the start and I am very pleased with this result! Here are some comparison pics. the first ones are on the first day of the pre op diet and the second ones are today (1 month later). I feel a lot better already although I can't see a very big difference on the pictures there.
I have started Mushy food today so I guess there is a chance I will put on weight a bit this week but that's life. I will try not to be disappointed.