I got some of those WK foundationless frames this summer too after burning through the first batch I made myself. So far no problems, although only a handful have been drawn out yet.
I was kind of surprised how wide the facet was at the bottom of the bevel (around 5/16+")....pretty "blunt". More bothersome was the fact it (the guide bevel) wasn't centered.. off by almost 1/8", which I guess won't be problematic so long as I maintain direction on them to maintain spacing...we will see. Maybe a machine setting got bumped and a few thousand frames slipped through before anyone noticed ;)