I have just fininshed the conversion of a K-Line #28 shay from the old style TMCC to newer ERR TMCC boards. My original goal was to make the TMCC commands of "go to speed X" to work. The original board only responded to speed up and speed down but not to speed X. The locomotive also advertised that it had smoke chuff with sped but it did not. This was a real major project. I obtained a new single board small steam sound board , a cruse commander M , and a new R4LC-08 from Electric Railroad. I had to custom design a plug board with terminals for the R4LC-08 since it had to be mounted by itself. I also built a board with a Arduino on it. This gives me steam chuff to the sound board and pulsing synchronized smoke to the smoke blower using the signal from the motor tachometer ( not needed for cruise control with the Cruise Commander M which uses motor back EMF) I had to completely rewire the entire locomotive and make a lot of custom interconnects and program the arduino. I would rate this as a 10 in terms of difficulty. I have photos and diagrams if anyone else wants to attempt this. You will loose all but the run program on the control board under the coal load. Works great and I can not use it on my railroad with JMRI and iPhone throttles. Before I could only use the CAB one throttle, which has a range of about 10 feet.
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