Thanks Joarek,
I'd suggest that you start a separate topic asking for help on modeling the bike's tank and any other parts you are having trouble with. When you solve each problem in a separate topic you can the update this post and continue to develop your bike so we can see progress.
BTW, this is coincidental. While having lunch yesterday with my wife and Jock (dog) on the terrace of the Gourmet Cafe in our town we met two women from Norway. Jock made friends first and introduced us all. They were two teachers on holiday. Our planned one hour Sunday lunch turned into 3 hours with quite a few beers. We talked about Norway and Ireland and how life is lived in each country. I thought beer and cigs were expensive in Ireland! It looks like they are much more expensive in Norway π
Mike