Odds are your phone has a modern connector so this isn’t necessary. I replaced my pixel 3a, which I bought in September 2019, last December. Thanks to wired phone projection, I cycled its USB-C connector twice a day for 5 years and 3 months. That’s ~4,000 cycles. The connector specification calls for a 10,000 cycle lifetime.

I did have to de-lint the connector from time to time, but other than that I had no issues.

Not to say that you shouldn’t use inductive charging of course :)

I’ll take a stab at the colors: slicers are very good at consistent extrusion widths. They do the best they can with varying width, but rarely nail it the first time. The only thing you can really do is fiddle with print settings or change the design to have consistent width extrusions, but that will obviously impact the design. Even with consistent width extrusions you might have to fiddle with extrusion width to nail it.

As for your first layer, are you seeing different squish in different areas of your bed? If yes, are you using a bed mesh?

Grab a few of Ellis’s first layer patches, spread them around your bed, and focus on getting them all to look the same.

Edit for link: https://ellis3dp.com/Print-Tuning-Guide/articles/first_layer_squish.html

Bonus points for talking like they’ve been a teacher for a while!

Why not just build a Voron? Other than your bed size, nothing else you listed wouldn’t work on a Voron build. If you want to make it your own, the design is fully open source so you can modify to your heart’s content. There are also a ton of “unofficial” and “official” mods.

It’s worth saying that CoreXY != bed slinger, so…