TLDR; Stick with the CG50 unless you find the new UI compelling

Released about six months ago, I finally picked up a Casio fx-CG100. Physically, it is a very pretty device, and the buttons feel great. I was excited to benchmark it and put it through my torture tests, but was pretty shocked by the results. It is actually a touch slower than the CG50 on all of my benchmarks, and uses the exact same algorithms as the CG50. That means that the gains in precision that we've seen with the fx-991CW do not carry over to the new flagship graphing calculator.

The UI has some welcome improvements, especially if you do a lot of linear algebra. On the main calculate page, defining vectors and matricies are only one button press away instead of digging through menus. I personally find the Catalog and Tools method of accessing functions to be a more intuitive method than the F-buttons, but your mileage may vary.

The biggest difference between the CG100 and the CG50 is that the CG100 lacks the ability to install additional programs. That means no khiCAS, and you're stuck with only what comes preinstalled. If I wasn't a collector/enthusiast, I'd strongly recommend giving this particular calculator a hard pass. As it is, exploring the unique UI and enjoying the physical attributes of the calculator make it worth it to me, and I'm happy to have it in my arsenal.

The last three pens that I picked up were Nahvalurs, including a couple of big, chunky Nautili. I love the heft of those pens, and when I first pulled this M205 out of the box I was shocked by how tiny and light it is. At first I would have described it as feeling insubstantial, but after spending a few hours with it, I'd have to say that it is a delicate pen. Not fragile, but delicate. It is such a lovely writer!

I have it inked up with Anderillium Roseate Spoonbill Pink.

I have a couple of Lamy 2000s, one inked with Diamine Wild Strawberry and the other one with Sailor Manyo Yamabuki. It takes me a couple of months to write them dry, after which I give them a good cleaning and ink them back up again.

The Diamine Wild Strawberry has been fine, but about a month into my latest fill of the Sailor Manyo Yamabuki it started coming out as a distinctly dark brown. I took the nib and feeder out to give it a scrubbing, and there was a build up of residue on the nib that took some scrubbing to get off. The ink behaved fine for the rest of the day, but has already started to darken again after about 72 hours.

Should I dump what's left in the reservoir? Try a different ink? Or is this normal for Yamabuki?

I finally got around to picking up a Majohn A2, and it has been a phenomenal writing experience! For an extra fine nib, it is wet and smooth, just the slightest bit of feedback from the paper. While the action of the push button has a noticeable hitch in it, it is still a very satisfying frob to play with. The size is perfect for the weight, and the clip doesn't get in the way of the way that I hold it. The only thing that sucks about it is that now I want one in black that I can fill with Platinum Carbon Black and a dark blue one to fill with Diamine Midnight. Many thanks to @dual_sport_dork@lemmy.world for the review that sparked my desire!

Nahvalur Original Plus in Matira Quartz with a Medium Steel nib, and inked up with Diamine Frosted Orchid. Absolutely stunning combination! Bonus definition of the word chatoyant.

My new Asvine V200 Titanium with a medium nib arrived yesterday. The vacuum filler is much smoother than any of my V126s, and on par with my TWSBI Vac 700R. I also picked up a 30 ml bottle of Diamine Earl Grey, but the number of fills I'll be able to get with this pen is limited by the section being too wide to fit in the mouth of the bottle. I need to get different ink? Oh no!

Calculator is a TI-nspire CX CAS, and was my first calculator with a built-in CAS.

My wife got me this Hongdian 1851 for Christmas last year, along with the astronaut pen holder. Since I keep it out on my desk, it is the pen that I reach for most often. It has the finest line of all of my pens and I keep it inked up with iroshizuku murasaki-shikibu, which is an incredibly close match to the body of the pen. It has a lot of feedback without being scratchy, and is great to write with.

The calculator is a Casio fx-260 Solar II, which Kristi also got me for Christmas some years ago. It's the calculator that I grab most often since it is the easiest to get to. It's my little Apocalypse Calculator since it has no battery and is solar powered only.