Videos of UP 8500 turbine pulling 75 vintage metal Athearn, Varney and wood Silver Streak, Ambroid freight cars.
I was wrong, the turbine couldn't handle 100 cars upgrade. I'm guessing 60 would be OK. Heading East (up hill), I had to 'double up' to get the train over the first hill. After that no problem.
At Tye: Metal wheels over turnout sounds good. (videos and pictures always reveal errors that one doesn't always notice in 'real life': already fixed that one building roof and cupola!)
https://www.youtube.com/watch?v=t55dmF5mTQI
At Chumstick Canyon trestle:
https://www.youtube.com/watch?...amp;feature=youtu.be
At Marias Pass:
https://www.youtube.com/watch?v=Ba2IpQL2Hes
At Skykomish:
https://www.youtube.com/watch?v=W7lLaM506do