I just picked up a lightly used Black Elk and shot it yesterday for the first time. Seems fine for such a low cost W&W riser and has a fair amount of deflex to it. Nice medium wood grip similar in size and shape to those on the WNS target risers. If you like a fairly light weight riser, the Black Elk is worth a look. My 38# Hoyt limbs made 38# with bolts only 3/4 turn out from max. I set the tiller even and the brace height at 8.5" as a starting point. If I decide to hunt with it, I'll likely drill and tap a couple holes for amo quiver mounting.
Yeah, I also have a 21" WNS Explore riser for the grandkids and, comparing the two risers side by side, they look almost identical, except for the sight/quiver holes, clicker extension, and extra plunger hole on the Explore. WNS cautions a 40# max on the Explore, whereas the Black Elk can be purchased with up to 65# limbs. I've read speculation that the BE may be forged versus cast for the Explore riser, but perhaps it's more about the Explore riser having less strength due to the location of the extra holes for the clicker extension and plunger? It's hard to understand why W&W doesn't drill and tap their hunting risers to mount a quiver (no provision for a quiver on the Black Wolf riser either), but it is what it is.