When my son was in college and worked in a music hall setting up equipment for musicians, he said they used JB Weld all the time.
I didn’t know about it until I was putting together a Cozy Coupe child’s car and the parts were severely deformed. Instead of taking it back to the store, he whipped out some JB Weld and glued the top to the body. It held up all the years of use after that.