Skunk Hunter,
After my Regs arrived, I pulled the kydex liner out to see what I could do. I added some Tetra (gun grease) to it, and after the finish "smoothed out" on the thickest blade area (spine) it fits, but I don't need the thumb snaps to keep it in there!
My second, and just ordered third Regulator won't ever see SpecOps sheath time...as they will eventually be gifts for our children (we are going to begin the adoption process for - hopefully - a brother and sister in about a year).