I want to join Code 70 to Code 100 flex track using ME transitional rail joiners.
The track in question will be straight, no curves and no turnouts.
Is it necessary to install shims under the Code 70 track as it rises to meet the Code 100 or just leave a natural unsupported rise and back-fill with ballast ?
I have previoulsy joined Code 70 to Code 55 with no support, but wasn't sure with such a "large" difference between C70 and C100.
Appreciate your advice