I've strung 20 racquet days on both. I have multiple stress fractures in my lower back. On a star 5 i went home and my back hurt. on the baiardo it felt like it had been any other day, back felt great. I also support the baiardo because i found the clamps much more effective and repairs / maintenance where easier to do myself without prior experience or instruction.
"I knit with fence wire for a living" .... its as exciting as it sounds.