Here soon I will be rebuilding the curved sections of my outdoor railway due to wood rot. I am considering going away from the LGB track I have and using Marklin's gauge one track for its more scale like look. LGB is like girders, dependable but way over scale. My railway is raised at waist to chest height, not ground level. It is also under a large shade tree. I would use the largest radius that Marklin offers for my curves. I would only need 4 switches to replicate the current track plan I have. I would sell the LGB track if I do this, it is all in good usable condition and my larger radius curves, LGB R7 15.5 foot, are brand new in the box still. Here is a pic of my railway.

But do you have any LGB locos and rolling stock? The flanges on LGB wheels are too large to run on Marklin track, so think things through before committing to changing it.