I usually check my strips for dimension (both correspondence to the design thickness from the taper plan and consistency flat to flat) by carefully taking measurements with a digital caliper. I know that this is less than accurate, since the apex, which is always one of the reference ‘sides’, is very easily crushed, resulting in an undersize reading (the actual crushing of the apex itself is not so much a problem). There are better, more accurate ways, to measure dimensions of a (equilateral) triangular strip. The most common approach among bamboo rod makers is to use a so-called Waara v-block, named for the rod maker (and machinist and inventor) who popularised it and manufactured them for sale. The principle behind it is that you put a strip in a 60 degree v-groove in a block that has a cutout for a pair of calipers, supporting the apex side of the strip with the groove, rather than by its apex alone, and measuring the thickness of the strip-plus-block. If you know what the net thick...