I tack weld parts that can slip out of position but carefully do I can just cut and move if I want to test a different setup.
After a couple of track days on DOT race tires I found this to be the best cure for barely any cost or time.
I tack weld stuff all the time at work. "Non-metal worker" co-workers complain. I'm like, "really... It will never move, ever, and if you need it replaced or moved, its like 5 seconds with a torch".
Of course.... I work on heavy machinery, not painted cars, so... Lol. I had never though about tacking something like suspension parts, lol.