.049 powered models fly on specific length lines, be carefull about making the lines longer, it may not even fly with the long lines.

I would get rid of the soft string for the lines and use actual braided lines, like you said from brodak.

about getting dizzy:

1) .049 powered models still get me dizzy so some degree, I have flown 18 lb models on CL with 65 foot lines and they fly much slower and don't get dizzy at all. The bottom line is you have to keep you eye on the model, let the background become a blur and pay attention to the ground level for obvious reasons.

2) if you build a larger model then you find the lines are longer, the model flies slower and you won't get dizzy as much.

Good luck and stay above ground

Fred Cronenwett