Yes,, i talked to Bill,, he's the dude on ebay,, i like his mix especially when he adds the ppm,, but some of his formulations don't contain the plant preservative mixture,,, he's stuff is good so are his videos,, that's where I started,, but he doesn't use uvc and he's not doing callus culture or exploring auxin : cytokinin ratios,,, i love his work but the second you finish his videos you quickly see the Indian videos rule YouTube