Repeat-O-Meter for Surface Plate Calibration

#INTRODUCTION

Years ago when I first saw the Repeat-O-Meter, it seemed to me a very simple device that could be easily built. Why then did they retail for over fifteen hundred dollars, for such a simple device?

So, based on photographs of the actual device, and Tom Lipton's improvement of various features, I've produced my own version of this device which anyone with a basic shop shoulld be able to build.

I do not recommend 3D-printing this in plastic, I place this here anticipating a t