I have a Shen-Hao, and a Graphmatic. What I'm wondering is this: is the increase d thickness of the Graphmatic likely to cause any damage to the springs on the S hen-Hao? I inserted the Graphmatic and it seems a little tight, but I don't have enough experience to know if that will cause any long-term harm to the springs. Attaching it with the Graphloc mechanism seems prone to light leaks (it doesn't hold the Graphmatic very tightly).