I checked out your link on those DirtNap heads and they remind me a lot of the old Ben Pearson design - at least in profile.
Hard to believe their claim to be the best flying head on the market. Any minor out of tune condition and that broad profile is IMO is a combination of erratic flight circumstance. I'd stay with a more slimmer profile like Viper Tricks, Muzzy Phantoms, or Magnus Stingers.