In the past, I have looked upon the Pilot G-2 more favorably than some other online reviewers, but I’ve still never used one for any time beyond the review period, and it isn’t exactly a pen I would be recommending to anyone. The best things about it are that it’s cheap and well-built. So, of course, someone came up with the idea of combining those features with a better-writing tip. With a few simple modifications you can get the G-2 to accept Mont Blanc ballpoint refills, but is it worth the hassle?
The actually “modding” process is pretty simple once you have the components. Remove the ink cartridge from the G-2 (obviously leaving the spring inside). Then open up your Mont Blanc pen refill of choice. These refills come with a plastic sheath to prevent accidental markings (and probably some damage); cut a thin, short tube out of this material and to slide around the refill like a collar. Then cut a longer tube out of the rest to fill in the space between the click mechanism and the refill (more detailed instructions can be found with a quick internet search). These two bits should ensure that the refill is long enough to work with the mechanism, and keep it straight enough to operate.
In terms of usability, I like the Mont Blanc refill, but not as much as many others do. Comparing it to the G-2 is a little apples-to-oranges, since my refill is a ballpoint one, and the G-2 is a (gel) rollerball. While the G-2 with its liquid ink and precise point, could feel slippery, scratchy, and blobby, this refill is super-smooth and easy-to-handle. It is buttery, and much smoother than your average ballpoint, but that’s also its biggest problem. Sometimes it feels like the tip is holding you back, or you’re writing in oil. Other problems, like startup issues and some blobbing that are common to all ballpoints are present, but more minimal than you’ll find in pretty much any other pen. It’s a very good writing experience.
If you want the nice feeling of a good Mont Blanc refill for a cheap price, this is about as low as you can go. The actually assembly can be a bit fiddly (there are a few places where the new pieces of plastic can scrape and lead to a sticky feeling mechanism) but at less than $30, even if you need to buy a cutting mat and hobby knife, it’s miles below the nearest Mont Blanc (and I don’t know any other pens that use the refills), with the G-2 still being a super sturdy and comfortable body for the refill to live in. If you don’t believe that Mont Blanc has the best refills ever (like me) or you’re comfortable with your Cross and Parker refill pens (also like me) then you needn’t go anywhere near this trick, but if someone hands you one to try out, I’d at least try it out.