diff --git a/nmrpy/data_objects.py b/nmrpy/data_objects.py
index e9e1cd8..013d3c5 100644
--- a/nmrpy/data_objects.py
+++ b/nmrpy/data_objects.py
@@ -1067,8 +1067,8 @@ def _f_fitp(cls, data, peaks, frac_gauss=None, method='leastsq'):
                     params[par_name].max = 1.0
                     if frac_gauss is not None:
                         params[par_name].vary = False
-                #if 'sigma' in par_name or 'hwhm' in par_name:
-                #    params[par_name].max = 0.01*current_parset['amplitude'] 
+                if 'sigma' in par_name or 'hwhm' in par_name:
+                    params[par_name].max = 0.1*current_parset['amplitude'] / data.max() * len(data)
                 if 'amplitude' in par_name:
                     params[par_name].max = 2.0*data.max()
                     
diff --git a/nmrpy/plotting.py b/nmrpy/plotting.py
index de6c047..d283496 100644
--- a/nmrpy/plotting.py
+++ b/nmrpy/plotting.py
@@ -172,7 +172,8 @@ def _plot_deconv_array(self, fids,
             figsize=[9, 6],
             lw=0.3, 
             azim=-90, 
-            elev=20, 
+            elev=20,
+            roll=0,
             filename=None):
 
         if lower_index is None:
@@ -213,7 +214,7 @@ def _plot_deconv_array(self, fids,
 
         xlabel = 'PPM (%.2f MHz)'%(params['reffrq'])
         ylabel = 'min.'
-        if 'acqtime_array' in fids[0]._params.keys():
+        if type(fids[0]._params['acqtime']) in (float, numpy.float64):
             # New NMRpy _params structure
             minutes = [fids[i]._params['acqtime'] for i in range(lower_index, upper_index)]
         else:
@@ -227,7 +228,8 @@ def _plot_deconv_array(self, fids,
                                             ylabel=ylabel,
                                             lw=lw, 
                                             azim=azim, 
-                                            elev=elev, 
+                                            elev=elev,
+                                            roll=roll,
                                             )
         if filename is not None:
             self.fig.savefig(filename, format='pdf')
@@ -243,7 +245,8 @@ def _plot_array(self, data, params,
                 figsize=(9, 6),
                 lw=0.3, 
                 azim=-90, 
-                elev=20, 
+                elev=20,
+                roll=0,
                 filled=False, 
                 show_zticks=False, 
                 labels=None, 
@@ -305,7 +308,8 @@ def _plot_array(self, data, params,
                                             ylabel=ylabel,
                                             lw=lw, 
                                             azim=azim, 
-                                            elev=elev, 
+                                            elev=elev,
+                                            roll=roll,
                                             )
         if filename is not None:
             self.fig.savefig(filename, format='pdf')
@@ -329,7 +333,8 @@ def _generic_array_plot(self, x, y, zlist,
                 lower_lim=None,
                 lw=0.3, 
                 azim=-90, 
-                elev=20, 
+                elev=20,
+                roll=0,
                 figsize=[5,5],
                 show_zticks=False, 
                 labels=None, 
@@ -357,7 +362,7 @@ def _generic_array_plot(self, x, y, zlist,
 
 
         fig = plt.figure(figsize=figsize)
-        ax = fig.add_subplot(111, projection='3d', azim=azim, elev=elev)
+        ax = fig.add_subplot(111, projection='3d', azim=azim, elev=elev, roll=roll)
 
         for data_n in range(len(zlist)):
             data = zlist[data_n]