I just read this on a grip vendor's site:
"For instance, there are model 4s out there that cannot be closed by anyone and other model 4s that are only as strong as a stout model 3. Likewise for 2s and 3s, etc."
If you have a #4 that is like a stout #3, it has been TAMPERED with.
This guy has been upset since his quest to make the perfect gripper failed miserably. Somehow Ironmind is to blame.