I too recently got my own 3D printer - Prusa i3 Mk3S; a rather pricy printer (800 euros if you order it as a kit), but gives really nice prints. Made in the Czech Republic. It took roughly 6-7 weeks from me placing the order to the kit being delivered, then it took me a weekend to assemble the printer (I'm not very good with my hands usually). Believe me, having this fine machine deliver nice prints almost from the first time, when you've been the one assembling it from a bunch of motors, screws, plastic pieces into a full machine... is pretty impressive!
I've been experimenting with two variants that pretty much copy the original Raaco A75/A78 inserts: one with 5x7 compartments for Infantry-sized counters, the other with 4x6 compartments for Vehicle-sized counters (closely based on the file that was posted here years ago; I remade mine from scratch though). With my current parameters, the inserts will hold stacks of up to 13 counters: good for infantry (2 compartments will hold a full set of 26 counters for squads, for instance), typically too much for ordnance and vehicles. I might move to 2/3 height: this should be enough for most types of vehicles and guns (1/2 height might be a tight for for 6-deep stacks, as I use 1mm for the bottom).
One thing I'd like to find a solution for is something that will prevent stacked inserts from sliding laterally. Raaco inserts have small round "feet" underneath, but this won't print as the bottom has to be as flat as possible so it will lay on the print bed; I'd have to print tiny feet and glue them on.
I'm not sure if I will use my printed inserts for the system counters: this would make it possible to have a compartment for each single information counter, but will make accessing them harder.
Cost-wise (discounting the cost of the printer), each replacement for an A75/A78 insert will use around 40g of filament, so with 25 euros per kg this is about 1 euro each (this isn't cheap filament; I know you can find much cheaper stuff). For 2/3 height (so you'd stack them 3 deep in an Organizer instead of 2 deep), the slicer says it would use 27.6g of filament.
I'll be happy to share my source files, or STL files for individual models, if anyone is interested. I am using openscad, an open source modeling software that lets you describe your model as a program (this means I can make variants just by changing a few parameters). I posted a crude picture in the "Today in ASL" thread.