I've run my new K28 enough now that I'm beginning to have a pretty clear idea of how it behaves. Running forward, it runs smoothly and pulls well. With one load of fuel, it will steam for an hour with two brief pauses to pump more water into the boiler. It does not run nearly so well in reverse. It hesitates with each wheel rotation as if it were binding. I see no evidence that there is any mechanical binding and sort of expect that there is some problem with the valve adjustment. Have any of you had problems such as this? Any thoughts about setting it up to improve running in reverse?