To make sure what the frequencies are I imported Ekos' .csv file of the 2nd plot into Scilab and ran an optimization over the sum of a linear and 2 sines (8 parameters altogether).? The outcome is? amazingly clear:? One cycle is 75.63 seconds, the other 240.62 seconds.? The amplitudes are 1.66 and 3.61 arc seconds, respectively.? The fit is like this:
So, by relinquishing the spring loaded worms I get stuck with a significant worm cycle of 1 turn per 4 minutes, Earth's rotation.
Wow!? I thought I was provided with a "high precision worm"?
Ok well my DIY spring loading apparently takes care of it.? So my next quest is to fix the 76 second cycle due to the ball bearings in the worm blocks.? Ugh.