So, no custom scanners are really needed. But there are of course issues with scannability that become worse the longer the payload is. Easily solvable with link shortening though. The robustness centers around how modern scanners really work. No scanners really matching data module by data module. They're sampling the centroids in the approximate locations. So long as we keep the relevant centroids the right color, we can use the rest of the space as we want. There is more that can potentially be customized too, but I like how it currently looks. Might add rounded borders though.