All of these railroad/dry sections aren't there with a better ink (I am trying to get rid of the remainder of a visconti green ink sample I got to try with my divina metropolitan. I hate this stuff, it writes horribly. Waterman green and robert oster peppermint are far superior performers.) Also lease excuse my fast, nasty chickenscratch writing sample. If you want to write bigger (to the absolute max flex) and faster, simply put a piece of scotch tape over the nib and trim it to fit, and it'll overfeed the thing into low earth orbit.
Completely unmodified ranga feed. Even a chewed out noodlers feed simply doesn't flow this nicely. When I bought a ranga 3c from Mr. Ranga on ebay, I got a spare feed with the pen for free, so that was awesome! Essentially this does cost about $60 total, because you need to buy a konrad, a box of zebra comic G nibs, and a ranga pen of some sort, but you do get two pens out of it (and the ranga pens are really fun on their own)
The feed does extend a hair into the ink chamber of the noodlers konrad, but that may actually be why this thing just flows so well. It only loses maybe 5% of its ink capacity and nothing is harmed in the filling.
It does fit with the konrad inner cap, but I use this thing so often that I don't need it, and I hated the ink behind the cap, so I removed it. No drying out issues when used daily.
The only thing that you have to "modify" is very, very easily done with lots of room for error. Take a pair of wide pliers (not needlenose, wide enough to fit the whole base of the nib in the flat of the plier) and squeeze just hard enough until you feel it "give". A little more than that is just fine, but I find that as soon as I feel it "smoosh" the back of the nib the barest amount, it fits happily. While it is possible to simply jam the two in together, it makes fitment way more obnoxious and you actually save a lot of effort doing it this way.
Then line it all up as normal, I find it's easiest to insert by lining the nib and feed up with the gap of the nib lined up with the third slot on the feed, insert it until the nib bottoms out in the slot, and then gently slide the feed down until the first or second (really makes no difference) fin lines up with the slot on the nib.
I really quite like this nib, even for everyday writing. It lays down a lot of ink, so you can't really flex it wide if you need to change pages quickly, and some inks like noodlers golden brown can take TWENTY minutes to dry. Personally, I find the sailor jentle inks (souten, oku-yama, and yama-dori are my favorite) to have incredibly quick dry times along with a heavy amount of sheen that this pen REALLY showcases.
Line variation is insane, needlepoint (0.1) to 3mm, no risk of springing it unless you're literally trying to fold the nib in half, you get a box of 10 nibs for $10 so there's plenty of room for mistakes.
It's also great for sketching and drawing.
People say the nibs can rust. I have done that once, and it was only because I cleaned the pen and put it away without completely drying the nib and feed. With ink, I honestly haven't seen the nib rust yet, and the one in there has been daily writing for three months without a spot of rust.
With the noodlers feed, I've heard a lot of people having flow troubles, having to widen the channel and risk ruining the feed, needing to prime it regularly (I never have to prime this one, though when I used the nib in a jinhao x750 I did need to prime it every half page or so)
Also, one thing I haven't tried, but would suggest for that extra insurance against corrosion, is to just drop the money on the somewhat more expensive coated zebra comic G nibs. They do last longer in dip nibs, but I didn't have any to try in this application.
I take this pen with me wherever I go, it's an incredibly fun pen to scrawl with, puts fun, pretty headers on pages at the beginning of class or new chapters in my notes, and has never failed to perform. Again, in this writing sample, disregard the railroading and dry spots, Visconti green is absolutely the wrong ink for this application. (also don't even think about trying noodlers polar colors, they will eat right through the paper with how heavy this pen lays it down!)