I seem only able to purchase the hand held flat files as thin as 47thou (1.2mm), width typically .22inch (5.5mm) and length of file area 3inch (50mm). I usually buy the Swiss Vallorbe files from Shesto UK. I need to file slots of 30thou (0.76mm) gap and thus these files are too thick, and I need a square end to the slot, so gluing emery paper to a steel rule is not going to give me the square side, I need a file with a filing edge. Why is it that 30thou and 20 thou files are not marketed. You can get miniature files like needles, gorgeous !!, but the square ones are much thicker annoyingly ! The material I am filing is plastic kit type so breakage is not a problem.
Does anyone know of a source ?
Guess its double sided tape, a thin steel rule and fine emery or flexifile strips (Aeroclub) but stumped at how to square the slot ends ! Why are we stumped in this day and age by such basic reqirements still !