I voted euro 100 twin band too because....
...my 106 has a muzzle for just one band and I can't change the muzzle because it's stuck in the barrel for salt and rust!
Now I have some inputs scattered thoughts on what has been said by the other friends here:
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reverse trigger. The trigger with the loading notches back 7cm (i-e. the mech behind the trigger) was "invented" by Marco Bonfanti of C4 on the Monoscocca guns, AFAIK, all the others came after and copied (Cayman, Pathos, Effesub et cetera et cetera all copied this type of design).
It's a good solution because it gives a longer band stretch and more "power" compared to other guns of equal overall length. But it requirers a longer loading pad, to avoid the loading become unergonomic and difficult.
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squid section. The squid section, or ellyptical, or "cuttlefish bone" section for the barrell is very good for side tracking because it "cuts" the water in the left-right swinging. BUT you must take care of the position of bands: if the bands protrude too much above the barrell, they will spoil the hydrodinamic effect of the ellyptycal barrell.
I mean it's not just the nude barrell who must have an ellytpical section: it must be the barrell+bands as a whole who must have an ellyptical section. Thats why the bands must be somehow hidden in the profile of the barrell by some kind of groove carved in the sides of the barrel.
Hope this helps
