Backstory: I bought "10 Hellions" on eBay, but when the seller went to ship them he realized there were only 9 of them. Instead of cancelling the sale (it was a great price, even for 9) I asked if he had any Dark Eldar bits he could throw in to cover the difference. Turns out he had a couple spare Reavers laying about (probably from the Gangs of Commorragh box) and he was happy to throw them in for me.
And thus, this abomination was born: https://imgur.com/a/CwRLR
It's definitely not cost effective to be cutting up Reavers to make Hellions, but they'll certainly work in a pinch!