A while back, I embarked on a construction project that has taken some time to develop and is in the final phase of completion. I had heard about the possibility of building a Speed Matching Circle that would automatically create the Speed Table for a locomotive based on a given maximum scale speed. Any locomotive that was run through this process would run beautifully with any other that this was done with. It can be built for any scale. I found that the Raleigh North Carolina Model Railroad club has modelers that built two such layouts and contacted one based on the information provided in his documentation: https://nrmrc.org/dcc/app-notes/dcc-locomotive-speed-matching. The system runs on a Jython script within the JMRI DecoderPro software. I am still sorting out some issues with the whole setup but hope to have it fully functional and portable soon. Attached are some pictures of the setup that I have built using some ash and oak plywood, a Digitrax Zephyr and BDL168 Block Detection board.