One of the most useful things that I print is Gridfinity storage boxes and holders. I try to organize as many of my tools and supplies using it. I sometimes do a little leather working for fun and have a drawer full of hardware, all in their own bins. In my garage my sockets, wrenches, etc. all has a Gridfinity holder. I design my own as much as I use pre-made ones. A while ago I even saw a shop that used it to organize most of their small wares. It’s an incredible system.
Another note: PLA has gotten significantly better in the past few years. PLA+ is legitimately better while being as easy to print and the Polymaker HT-PLA and HT-PLA-GF are even better as you can meaningfully anneal them after printing to make them strong and temperature resistant enough for some very functional prints.
I like having a gridfinity grid on my desk with a number of various sized boxes for at-hand storage of things like paperclips, tacks, pens, etc...
In the garage, I have one that I can slap down anywhere, with a couple boxes that I can load for the screws, nails, washers, nuts, and bolts, etc... used in my current project.
Having the grid makes the boxes sit firmly in place.
Any reason you are recommending PLA instead of PETG?
Unfortunately, even annealed HT-PLA-GF still creeps quite a bit. I find this to be the main problem using PLA as an engineering filament. For many parts it doesn't matter, of course.
The A1 has a relatively small printing plate. How does it work for boxes that are larger ? You print them in pieces and click / glue them together ?
I think PLA is a lot stronger than people give it credit for, especially if printed at 100% infill. I finally had a chance to use the PLA-CF that came with my Bambu X1C for a replacement part on my tripod, and it's great.