Rail For The Valley Needs Your Help – Information Needed Please

Rail for the Valley has been asked to find some answers for a railway enthusiast overseas.

First, he would like to get some information on the wheel profiles of CP & Southern Railway diesel locoA?ai??i??ai???s, e.g:

1. GMDD GP/SD40
2. GMDD SD70/75
3. GMDD GP33
4. GMDD NF210
5. GE Dash 8/9
6. MLW RSDA?ai??i??ai???s

Photo by John Friesen

Secondly, he would like:

1. Any information that you might be able to point me towards on existing switch/point/turnout configuration design on the Southern Railway.
2. Switch rail type
3. Crossing Flangeway gap dimension
4. Switch Opening dimension
5. Flange Tip running?
6. Switch/turnout mechanisms/point motors
7. Switch detection system?

Can anyone help with his requests?