Just not practical for me. Too time consuming, costly plus you still have the look of 3R thick toy HI rails.
I don’t notice couplers on operating trains anyway. Besides, you still have a more noticeable middle rail, thin axles no cut coupler bars and large incorrect wheel flanges. I don’t see the point.
All model O trains should have always been 2 rail from the beginning.
Sorry Joey, I just can't go with it.