I have just come to the finishing stages with my Tiger 2, and even with extra care in building the fusealage, I still ended up with an oh so slight twist in it. How..... I dont know, so like the others said, be carefull and have patients. In my manual, very last page was suggestions for taildragger option, see if there isnt something in yours too. My main gear is right at the leading edge of the wing. Have fun!