I also forgot to mention the project from Scullcom.uk for a 10Mhz reference oscillator. Granted it is designed to be more of a bench reference, but I'm sure you could accommodate for that! His project is based on the Neo 7m for reasons he describes in the video. I've not seen many of those around so if you wanted to do this project you may want to look for the Neo 8M/N or other newer variants that have the 10Mhz capability.
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http://www.scullcom.uk/category/projects/frequency-reference/
