Loco
This is were that rail bender excells!!! You can get nice sweeping curves and transitions . You put the track down, run the bender back and forth addjusting as you go to get what you want! Note: you can do it in place, great to tweek problem area's.
So did you install all the track? Once inplace it will work a little better that on paper..try putting it all together..then you will see if you need one or if you can get by..
Good luck.
Sean