The Forum GSC and the OGKB aren't heavy yielders. I'm not sure which cut I have, but it is vigorous in veg, stacks very well, and yields much larger buds than the Forum, the nose is identical (stronger), more potent (grew them out together). I suspect it could be "OGKB 2.0", or someone got lucky with some bag seed.
I recently scored huge off of some Animal Cookies beans ("bag seed" from sista).