G'day Tyler,
Last time I used Big Bob, he only had 2 flat blades, but have a pair of low lift blades ready to add for next use. Have to wait for the verge to grow haha. Did your Big bob handles shear?
Don't know that fluted 'lift/fan' blades would offer any advantage, on a Big Bob. I just fitted a second set of the OEM type flat blades.
Yeah, the handle bracket fractured, for the second time - on the near side in this pic:
And a FleaBay donor mower @$20, which had the '3rd gen' strut reinforced bracket type, was by far the cheapest repair option.