N Gauge Flex Track Retainer

These files are for retaining pieces for N gauge flex track, I used cheap stuff from trainz.com. The radius for these is roughly 10inches, but my math could be wrong. They have spaces running through them that could be used for alignment pins, or to run wires for power to accessories, and I have a handful of models with access holes to allow you to tap into wires run through the retainers.