Although notionally sealed and air purged, the large size of the display and its location adjacent to flour silos, inevitably resulted in problems with individual discs not always flipping, due to small amounts of dust on their pivots. The system also required a PC to be permanently connected.
Quercus was asked to look at the original control system. After carrying out experiments it was shown that reliable operation could be achieved using a sequence of pulses to flip the disc, rather than the original simple pulses.
A replacement display control system was designed and installed using a small dedicated control computer. This has been in use now for several years. It automatically adjusts the time between summer and winter time and is fully Year 2000 compliant.