Where I bough the solder they had no silver specific flux. I am going to have my friend at the welding school do it as if I wreck the struts, I am screwed. I am going to post a picture of how crappy the spot welds are on these things. Finally after 3 weeks of nonsense with Horizon a set of struts are on the way supposedly. I found this service experience with them disappointing to say the least. They seem to be slipping with not enough people to deal with customers.