Hollow Clock - Nano Base

This is not really a Remix - it's more of an add on.
The very fine Hollow Clock V that you see is 100% shiura's design https://www.thingiverse.com/thing:6647784
My addition is simply the base that the Hollow Clock stands on.

I needed a base because after printing and assembling the Hollow Clock I felt I wanted to control the clock differently and needed a place to house additional components such as the Arduino Nano that I would be using.
I did not want to affix the base to the clock so, to this end, it simply slides on.

The Hollow Clock requires 15 360 steps of the stepper motor to advance 1 hour.
I decided to drive my clock 64 steps every 15 seconds.

1. I did not want to rely on the processor for the base timekeeping if the sketch included delays and the like so I came up with two solutions.
a) a sketch with instructions specifically arranged for accurate timekeeping using the processor crystal
b) stripping the clock module (crystal and IC) from my quartz wall clock i