I have one of the small Hettich electro-mechanical clocks in which a small weight arm is kicked up every minute or so to power the clock. This one has a "balance" that resembles the 4-ball pendulum of a 400-day clock. It appears to be out of beat, in that at one end of its rotation the pendulum stops suddenly. This has the effect of making the clock run fast. It also sounds out of beat. Does anyone know how to adjust the beat on these clocks? There is a long, coiled spring that connects the bottom of the pendulum with the escapement--like a torsion spring but coiled instead of flat. If pictures are needed, I will post them later. Thank you!