YAMAWHO,
You should have little troubles running the 600/2600 Engines and Rolling Stock, keep a decent speed and a decent number of cars behind your engines, and your 036 FT should work decently with that Tin. Think of it as 027 Tin Plate. Now the 800/2800 series with the 12 wheel Tenders are going to cause some problems.
Good luck and happy Running.
PCRR/Dave