RE : I don't want to tinker with it every print, would like reliability and set it and forget it.
I am afraid it's not so simple.
You might not have to "tinker" with "every print", but you definitely can NOT just "set it and forget it".
Allow me to give you a "reader digest" of what will involve in 3D printing an item:
1. First you need to obtain a STL file of the item you want to print and download it to your computer. (3D printer experts can create their own STL files, but that's a more advance stage of 3D printing.)
2. Then, you'll need to install a Slicer software into your computer. There are a few slicers available, some free, some you have to pay for.
3. Next is to copy the STL file into the Slicer software. An image will then appear on the slicer screen.
Here is where you may have to "tinker" before you can proceed further.
Simple examples why you may have to "tinker" :
a) The item selected to be printed may need "Support". Without the "support" it may not get printed successfully. That "support" option needs to be selected manually from the Slicer, and there are a few "support" options to choose from.
b) The item selected to be printed may have only a very small portion of its part in touch with the "bed" (the build platform). Therefore, an extra base is needed to keep the print firmly at its proper position. That also needs to be selected manually.
c) The item selected to be printed may be in an orientation not best for printing. If so, one will have to change it's orientation manually.
There are many more scenarios which require changes to be made. Above are just for illustration purposes.
4. After that, "slicing" can start.
5. Slicing is a procedure converting the STL file to gcode file which will tell the printer what to do.
6. The gcode file can be saved to a sd card, usb flash drive, or by directly connecting the computer to the 3D printer with cable.
7. The gcode file will then be transferred to the 3D printer.
8. Once the gcode file is present in the printer, 3D printing can start printing.
9. The gcode file will tell the printer what to do. It's out of your hands now.
10. What is left to do then is to make sure no mishaps during the printing, and to make sure there is enough filament to do the job.
Disclaimer........ I am not an expert in 3D printer. I learned it only 3 years ago at the age of 76. I am just offering what I know to those who may be just starting the "hobby".