Not really having any issues, but I'm curious, are there any benefits to using the reverser at say 25% instead of 75%? Does it make a difference in handling?
In real life, 75% cut off means the steam is applied to the piston for 75% of it's stroke. This is the maximum torque setting, used for getting the train moving. It uses a lot of steam and all that steam has to be got rid of up the chimney after it's done it's work in the cylinder. So, once the train is moving the driver will "notch up" and wind the reverser back to save steam, and because there is less exhaust steam to get rid of, the engine will run faster. If more power is required, to climb a gradient for example, the driver will wind the reverser forward to compensate. So, in answer to your question, running at 25% cut off uses less steam and will allow the engine to run faster if the gradient allows.
So what you should be doing is setting off with the reverser at 75% then as you get moving gradually wind it back as the speed increases, think of it like a gear, the faster you go the higher the gear needs to be, I usually end up at 10% when it's at top speed.
