It is a fishing pole holder - so I can tote around all 7 fishing poles and take turns with my kids detangling them while they foul up the next one 
I agree I think I will continue with some recalibration tactics before I start messing with xy scaling. I just read through this post, and figured out that I need be more intentional about the height of the belt loop around my anchor on the stud that goes into the concrete - at this point I have just been letting it sit where it sits… So now I think I will build various length spacers so that they all sit at the same height as the height as the arm exits on the maslow (is that the correct way to do it? or should they all be the same height and the machine self corrects for the different arm heights?).
I did see a fair amount of wobble as the maslow cut the small circular pieces. It seems like changing direction causes a bit of tilt as it gets pulled from the top and torques around the base.
It has got me thinking about maybe making a big aluminum plate to sit over the plastic bottom and maybe try to nail the fit on the linear rods to make it more rigid. It would lose some z height but might be worth it if it is heavier and stiffer…