Thanks for your great pen review and your super-great pictures!
Been thinking lately about purchasing a celluloid Shark. I've never knowingly bought a celluloid FP and am curious about the material. I remember buying some sheets of celluloid awhile back. They're sometimes used to make guitar-picks, though I used them for a fine-art project. I really liked the scent!
As for the idiosyncracies and shortcomings of the pen, I agree with His Nibs, above, that the majority of all fountain pens, particularly the new ones right out of the box, do require some adjustments, sometimes minor and sometimes major! Even highly regarded brands such as Platinum, Sailor, Montblanc (yes, Montblanc) need tweaking, and I say that not because I'm a neurotic perfectionist; rather, I have found out through experience (and yes, I've bought pens from the three manufacturers I just cited) that I need to adapt those nibs--and virtually all nibs--to my unique writing style.
Rest assured, I'm not a one-note Johnny who harps on smoothness, smoothness, smoothness. I like smoothness, but it is certainly not my single criterion for judging the worth of a nib. Frankly, the smoothest nib I've ever written with is a Rotring medium stainless steel nib, which came attached to a 1995 Millennium FP. The pen looks like a Jackson Pollack painting. I really like it! And yes, the smoothness of the nib is truly the nonpareil of smoothness.
When I take the plunge and buy a Mako Shark, perhaps I'll publish my own review.
Thanks again for yours.
Don (aka Sir Nibs)
"He is no fool who gives what he cannot keep to gain what he cannot lose." (Jim Elliot, Christian martyr)