Got my Scorpion in the mail the other day and was surprised as to how wide it is. Bill Hayes must have mighty big hands!
Anyway, as I couldn't hold it properly and had been looking forward to receiving it for ages, I set to work with a rasp and various grades of sand paper (aluminum oxide).
After carefully removing quite a bit of material from the thumb side and a tiny amount from the index finger side, it now fits my hand just right
It certainly is a great slingshot and fits so comfortably in my hand and, as it sits securely it doesn't move in the slightest on the release making my accuracy even better than it was.
So needless to say I am very happy with my (modified) Scorpion.
Below is a photo of it after the mod: