So, the test piece measured out to be pretty damn close to what I had "designed it for". The TEST piece does nothing other than just to see if I could actually create something since 3D Printing is new to me.
Anyways, the only part that didn't measure like it should have was the hole in the middle? It measured to be approx 4.5mm and NOT 5mm?
Is it the slicer program? The outside dimensions were pretty spot on... just the hole was approx 0.5mm smaller than it should have been?
Could it be the extruding speed, how fast it cools, resolution of the printer, etc etc etc? As far as I know, this printer is actually a pretty decent printer and does pretty good detailed print jobs. So it's gotta be "me"?
I doubt it is the configuration scaling settings in Blender because, again, everything else is measuring almost exactly like it should (i.e. the small block is designed to be 10mm sq and measures approx 10.1x something and the base is designed to be 20mm sq and measures approx 20.xx... anyways, really close to the actual drawing). As far as print speed/mode, I did print using "normal print mode speed" instead of "quality" or whatever the higher quality print mode is for these things.
Finally, what happens if you run out of filament in the middle of a print job???
Thanks guys for the likes and feedback.