Hello @carverofchoice, @Seapup has given you what I did when I got wind of libraries doing 3D prints.
I will describe some of my experiences with library 3D printing. The first library was in a city where I visit my brother for a week at a time. I signed up for a library card (no charge) and emailed the STL file for a small project. Before sending the file I used a slicer program to check the integrity of the file and the time to print (not to exceed 4 hours and no larger than 5"x5") There was also a limit of one item per month. There are many slicer programs out there. I asked the librarian what printer and slicer program they use, I downloaded Cura for free and knew exactly what the librarian will see when she loads my file to be printed.
I asked her what if my project was a little over 5", could I orient it diagonally?
She said the machine prints much larger than that and in my case would not be an issue (because I’m an adult?). A day later an email arrived saying my print was ready and I picked it up and told her how nice it came out. And she said if you need something else printed send in the file. So I sent in another file that I wanted in white with black as an alternate color. She called to inform me that they were low on the white filament and would be doing it in black. I got the print the day after.
When I got home from my brother’s place I sent three rolls of filament in red, white, and blue to the library. Since then they have printed projects up to 10 hours long. But I also explained that these are proof prints to check before making the STL files available to the forum for free.
The second library is near my permanent residence. I was printing v3 related glare shields and dogleg support brackets. I told her these files are for the forum and that if she had a need for any of the files - go for it. I would send her pictures of completed installations using her prints. Also, showed her the Wyze app and the images from the v3 cameras. I get good service at this library also. There was no charge for filament or time for the prints at either library.