We use Munipack set of programs for basic reduction of CCD images. Precision of our measurements is better than 0.03 magnitude for 12-13 mag star, under good weather conditions. Preliminary results are available on-line - see lightcurves service.
Example of an observation - Jan 5/6 1999, eclipsing binary X Tri, a finding chart and the lightcurve with error-bars. The error in minimum determination of such regular and symmetric lightcurve is of order 1 - 10 seconds.