I attached some photos of the two Taz machines working.

Mini:

Working.  Able to print with no trouble but I did notice that the bed has a little bump (about a layer high) in it near the center.  Prints seem OK over it but if you want it perfect, move your print from the center using your favorite slicer.

Prusa:

Broken. This printer is in my basement shop for repair.  An unattended print failed and created a mess which when the user cleaned it up caused a short that blew a fuse in the Rambo controller.  This might take some time to track down and clean up.  New parts in the print head may be needed.

Taz 3:

Working.  I re-aligned the X-axis stepper motor pulley and tightened it up so that it no longer squeaks and slips.  I printed a 60 or 70mm high pillar with no X wobble.  It looked nice (see picture below).

Taz 5:

Working.  I synced up the two Z-axis stepper motors (the right side was about 4mm too high) and then went through the bed leveling process.  I also printed out the bed leveling test file to made sure the first layer thickness was near perfect across the entire build plate.  It looked good to me (see picture below).