Mill Creek Central RR. hosted an Train Order Operations only ops session on August 1820, 2023. The PNE is there is there to run the rails, as directed by Dispatcher, Charlie H. On the initial part of the run on the Valley Division I noticed that my engine was slipping a bit on some of the milder grades. I called for a helper, and ably assisted by PRR 8022 up the grade, eventually to Tower Interlocking. In this segment we pick up the helper at Orchard and proceed up the Keim grade to Barney Yard.