I used it in the Uni Ball Signo DX & don't even need scotch tap. Once you
measure & chop a piece of the orig. refill in the right size, you just place a
slim knock refill on top of it, use a spring to hold it in place & it's as good
as if it were made that way. Hope this suggestion helps some that like this
refill like myself but don't like to use a microscopic pen.
This is an example of an even further improvement to an already-existing great
product. The first two Machs were wonderful pens themselves. Yes, maybe wrote a
tad thick on certain papers with some ink spread on the steno pad I generally
use, but now this model eliminates any unwanted line thickness. The result on
paper appears like a gel pen. And with a nice spacy modern look. Those Koreans
really know what they're doing. Pilot and Uniball have no match! Nice work.
Yeah, I hack it into other pens too. For some reason, it's better than the
traditional hi-tec C but too small/short so I just get some scotch tape, extend
the refills and put them into just about any other pen (I've done Pilot G6s, Bic
Velocity, etc.) You learn to use your ingenuity.