Hi , Thanks for the suggestion. I ran into a bug with any custom profiles not being visible in the editor which left me with hand editing text files. Either way I had other issues with welding - mainly that the mass of the object was behaving incorrectly. I attached an object of mass = 0. It moved with the ship as if it was light, but when it hit objects it would send them flying away like it had m > 100,000 kg.
I ended up abandoning welding and now just use a physics constraint which seems to have fixed a lot of issues.