Hi Guys, Thanks for all your valuable input. It seems like the problem was a number of things all of which you guys brought to the light.
1) The push rods were very weak and were bending causing the nose wheel to behave erratically when the push rod snapped back into place. - So I replaced the push rods and reduced the left to right movement of the nose wheel considerably. It now has very little throw. (about 10 ft turning radius)
2) The the right wheel and front wheel were very tight compared to the left wheel, so I sanded the wire gear so that all 3 wheels turn very smoothly.
3) I then took it to a flat surface and pushed it hard and kept adjusting the nose wheel till it tracked straight. Finally I had to give very slight right rudder trim to keep it dead straight. I then adjusted the rudder so that it was dead straight even though I had a little right trim for the nose gear.

Tomorrow I take it to the field and will test taxi it without the wing,Hopefully it will not give me any more problems. Thanks again for all your help!!