N Scale Removable Wheel Stops or Bumper Decided to make wheel Stop Bumpers as well, they also turned out good. https://www.thingiverse.com/thing:4009194
Very cool. In the same theme you may want to make up: De-railers Cross Tie 'bumpers' maybe with a piece of rail across the track. I can't find my picture but I saw one in a commuter rail 'staging yard' within the past 10 years. The cross ties were piled about 5 high and the 'rail' was at an angle across the track. Speaking of pictures It would be great if you could post them here as well. There might be a small market for some of these items.
Here is a photo of the 3D printed and painted project. A de-railer should be pretty easy. A tie bumper will take a bit of work to make it reliable and removable. I'm not a big fan of these ether as the coupler pins on rolling stock on the model tend to hit them.