Subframe Connectors....buy or make?

Those of you guys installing them while on a rotisserie, are you doing the work while the chassis is tipped on its side? If so, any concerns that you’re welding some preload into the structure?

Did mine sitting flat on a rotisserie as well. No issues, car sits perfectly flat, gaps are perfect. Car is finished now going on 4 years/5000miles and only one small repair where we attached the new roof section that a crack appeared.. That was 3 years ago. You do make an excellent point though and I may have just gotten lucky.