I think the Adafruit response wasn't ideal, but it looks like the buyer foisting of some manufacturing spec problems on to Adafruit. It sounds like the user wa

I think the Adafruit response wasn't ideal, but it looks like the buyer foisting of some manufacturing spec problems on to Adafruit. It sounds like the user was destructively testing some parameter of the product that wasn't on any spec sheet. Then asking Adafruit to bear the cost of sifting through the product to filter the higher performance parts. When you're looking maintain some specific some off-sheet performance characteristic you usually want to source from the manufacturer or a distributor that's close to the manufacturer, not a hobby/maker type shop like Adafruit. It will almost always cost you more at that point too because Adafruit type suppliers can give you lower cost because hobby/maker buyers don't need the same tight consistency that a more industrial / research application might need. They could be buying odd lots off a different manufacturer every time. Edit: looking at Adafruits product page, they don't even have a spec sheet but a general description for ITO glass. The better way to handle this would have been to nicely ask Adafruit for the name of their supplier (or maybe former supplier) because you wanted to get something specific out of the glass.