To add further to my reply above, it could be the number in bold text below:

point.0 = 1, -16.92, 0, -18.85,   720, 0, 1.8, 70,  1.8,  1.0, 0.9,  9, 8, 0, 270, 290, 2
point.1 = 1, -102.5, -18, -19.8, 1500, 1, 2.2,  0,  1.4, 1.15, 0.9, 13, 11, 2, 270, 290, 2
point.2 = 1, -102.5, 18, -19.8,  1500, 2, 2.2,  0,  1.4, 1.15, 0.9, 13, 11, 3, 270, 290, 2
point.3 = 2, -136.7, -100, 4.8, 100, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 1
point.4 = 2, -136.7, 100, 5, 100, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 1
point.5 = 2, 2.5, 0, -2, 100, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0, 1
point.6 = 2, -174.0, 0, -5.15, 720, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 1
point.7 = 2, -199.5, 0, 41, 500, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 1
point.8 = 2, -47.5, 0, -10.1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 1
point.9 = 2, -134.2, 0, -10.1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 1

The reason for me thinking that it might be that, is because all the other 8th entries, on all the other lines, is 0.
That makes me think that it's possibly the turn angle, of 70^o, for the nose gear.
So increasing it to say 90 (90^o), or even higher, might improve the taxiing steering.