http://www2.towerhobbies.com/cgi-bin...?&I=LXD842&P=7
First powered R/C kit I ever built was a K.Senior. It is a relatively heavy plane (especially the way I built that kit) and it's very possible you smushed the nose gear ehough so it "took a set" to a sprung stance. It's a conventional 5/32" nose srut, I do believe.