If its HSM then it doesn't even use the screw drive. HSM lenses have their own focus motor built in them. The pictures of the sigma 105 macros with HSM on them all had the lettering HSM on the lens.
Like Len said, your going to have to do trial and error. Try each extension tube by itself on the camera with that lens and see if it works. This will tell you if it is just one tube and which one it is. BTW, I have had my kenko extension tubes for about 6 years and I have yet to ever need to use more than one at a time.