Yep, that would be Mark D Phillips, and the sad part is this seller calls himself a luthier and has been doing stuff like this for YEARS in a fairly successful eBay shop
He buys cheap 7-string guitars and converts them into wide-necked 6-strings for ham-fisted people, and he butchers cheap Gear4music B-stock acoustics into "thumb style" guitars. He's been going at this for years, and his work is just plain awful.
https://www.ebay.co.uk/sch/mdphillips19 ... 7675.l2562At one point there was even one of these Hitler rant clips made about him (with the famous bunker scene from Der Untergang) but sadly I can't find it anymore. Here is the man himself "demoing" a Perfect Balance Jazz Bass though:
https://www.youtube.com/watch?v=xI0QG2kDfb0