I think Byke is right, it is just a rebranded Stolen/ Tuff neck coaster. And yes, I think they had a female before KHE, but if you want to get tech about it, Zodiac Eng did a few one offs before anyone as far as I know.
I worked on a friends Stolen coaster for about a month, hated it, and never once got it working consistently, FWIW. There are a few on here, but only a few, that swear by them though.