If you have access to a TIG machine, grind off the welds a little to reduce buildup and run over them with the tig once more (no need to add filler). Some of those welds look a little cold, and being a suspension piece you want to make sure it does not come apart.
The 1st pic, the weld inside the round hub part. The right upper weld there, it looks like a piece of rope caulk sealant, that one has little or no "wetting"and it's a cold weld. Too high a wire feed, moving too fast or the heat to low (or a combo). What welder do you have? Weird thing is, some of them are fine, some have good flow into the sides.
I like those pieces a lot, guess I'll have to get some cut also. There's a stainless shp with a laser cutter across the street from the shop.
Where did you get the tubular section?