Cool, all that matters is the result for the end user so it’s of no concern to me which method is used in the end. The fun was had during the writing and discovery 
There were various differences and errors between the wiki, released paper and matlab example (see original thread). In the end I just compared the G’MIC output with images in the paper (can’t remember exactly where I extracted from), as well as checking the PSNR values were as close as I could get. If any double checking is required I’d suggest comparing to the original… it’s time consuming though.