Work has let off a bit and over the weekend I managed to get the pendulum electric clock dialled in. I actually used all of the techniques for minimising friction that you mention for the pendulum wall clocks and hence my amplitude is rather large and I had to have a few goes at tweaking the length and position of the static and active paws.
I am now pretty sure that I do not get any "2 second" pushes which would make the clock run fast. I will be checking this over the next few days.
It actually looks really great.
However, with the pendulum bob all the way at the bottom I am seeing the clock running about 1 to 2 minutes fast for every hour.
Assuming that I do not get any 2 second pushes I'm really not sure how to slow it down because the period of the pendulum is governed by the length of the pendulum and I cannot take the bob any further down.