I have a Hasselblad 500c that won't fit on my heavy duty tripod because the screw seems to be too short to catch. Seems odd because my lighter (and useless as you can imagine) tripod does screw into Hasselblad and it's screw doesn't seem perceptibly longer. And, yes, the heavy tripod does fit all my other cameras. Any advice on fixing this? I don't want to buy another tripod just for this one camera. Any way to get a longer screw on this tripod?