I'm glad you covered this. Many people overlook this when replacing the suspension spring on a pinwheel regulator.

Such a simple solution - thank you for pointing that out.

A neat design feature for sure. My NTR master clock with mercury fille pendulum doesn't have such a feature but the bottom of the clock case is less tha a quarter inch below the pendulum pointer. Also, i'm pretty sure the escapement crotch arm would catch the pendulum as well.

Please tell me hour wheel,minute wheel,center penion teeth calculation sir