The use of a good quality micrometer, specifically modified for the measurement of oboe cane, is mandatory if consistent results are sought. Shown are two types of micrometers specifically designed for measuring cane thickness  at various points on a finished reed. 

I use 10.50 ~ 11.00 mm tubes with a wall thickness between 1.50 ~ 1.65 mm and gouged at .40 .58 .40. I bind the shaped cane (Chiarugi shape) on a 47 mm staple to an overall length of 74 mm. These parameters allow my reeds to have the right and consistent opening at the tip. The reeds are profiled using my profiler, the crow is healthy with high and low harmonics present and with the right amount of resistance for me. Often oboists will say after scraping a reed in the usual way, "This reed is very stiff, I dont know why as I have done everything as I usually do". In most cases this is because the wall thickness of the tube is greater than usual. If the wall thickness of the tube is greater than, say, 1.70mm, the reed is usually not responsive enough unless more cane is removed from all areas.