Yes.. that stuff in the photos was welded with the HF 90 amp gasless flux core welder. Mine is an older model than the one in the ad... its right there in the picture of the welder cart...

I had the production welders at work do a couple of welds for me on the bumper mount for the tire carrier.. but their welds were so awful looking I did the rest myself with the HF. I just made two or three passes on the 1/4 plate and went really slow.