Extracting final positions and dEby fitting to the model
A c2 fit of the model to the cluster data is done, the dE, x0, y0, a, and l of the hits being varied.
The dE extracted this way is better than summing ADC values-- threshold problems are avoided, and overlaps are deconvolved
Switch 5 activates the fitting visualizer, showing the data and current status of the fit