I'd say you know what you are doing, profile sure looks good, heat and or penetration, fusion, sure looks the part ! I welded a hook onto the deck of my rotary mower, to make it easier to lift and flip over, few passes, but its got that void on the bottom side of the weld, I'm sure its on their but good, it should look like yours ! LOL !
Did you use a type of 7018 electrode and what did you have the machine set at and the size of electrode ? I know every machine is different, just curious.