Bearings Don't Fit ABS Printed Parts (Page 1 of 2)

Looks like your fundamental issue is axis skipping caused by over extrusion.  This also explains why you're having fitment issues. 
Not that what Carl stated is incorrect, as the primary redesigner of that part I can say with certainty, that's not your problem here.
If you haven't or don't understand how to calibrate your extrusion multiplier, let us know.

Could anyone post their settings (as a starting place) for Marlin Firmware Solidoodle Pro 2 e.g. Acceleration and so forth? Thank goodness I wrote down my calculations for XYZE and KP,KI,KD. I will load them and see if they're still accurate.

All the base values in the firmware are good.
The only thing you need to change in EEPROM is steps/mm for E
And if you do a PID Autotune you can change PID values but the base values should be very close.

<-- current settings after reinputting and testing... and PID autotune with 5 cycles

Use a solid cube and tell your profile to print a single perimeter with zero infill and no top layer.
Remember we are talking about fractions of mm's here.  Compound that over many layers and you'll have problems.
What is your extrusion multiplier set at currently?

Yes I did, kind of poked that in there while I typed
.5 is too much and you adjust that in your slice profile with "extrusion multiplier"
We calibrate steps/mm to set the amount fed to the extruder.
We then use our slice profile to determine the amount coming from the nozzle by telling it the actual filament diameter.  Then the extrusion  multiplier is our fudge factor to dial it in.

Granted all of these things control the amount of filament fed and at what rate.  It's best to start by entering the values that we know first.
Steps/mm fed in is the first know value
Filament diameter averaged across several feet is the second known value.
Extrusion width is the third known value (120% of nozzle diameter). .48 in your case.
Then we use "extrusion multiplier" as the final fudge factor to yield the perfect .48 extrusion to match the .48 extrusion path that the nozzle follows.

All of the above are set in your slice profile other than steps/mm.

Recap
1. Step/mm (which you've done)
2. Actual filament (averaged) diameter
3. Extrusion widths (tool path) set to .48
4. Test print and adjust extrusion multiplier until you get .48 single wall.

How do I input step 3? Is that done in the STL file creation process or something in Slic3r?

Extrusion width is in your slice profile as you have figured out.  (Clarity for others)
An extrusion multiplier in theory is perfect but in practice on your set up closer to .90 would be what I would expect to see.  As long as your single perimeter wall is measured at .48, that's all that matters.

Meant to add that it measures perhaps .5 in one spot and .47 in another so I took 8 measurements two on each wall all the way around and it hits ~0.49 rounded up so tweaking once more. The first time I ran it the way you described using a solid cube 1 perimeter thick it came in at 0.599mm thick

You must have had a great teacher somewhere along the way

Do you have a caliper?  There is some z wobble in your print, and since you are measuring across something like 5mm, the waviness in both directions is causing the wall to appear thicker than it really is, leading you to use a setting that under extrudes.  The last print you showed shows some underextrusion, or at least inconsistent extrusion with some gaps in the surface. 

With a sliding caliper, you can use the tips to measure just a few layers to get a truer sense of the actual extrusion with.