Well with those patches i try to find a sound that could kill a voodoo valve +
an old marshall 100watt(i think a really old model with no drive
 only 4 input something weird...for me),well i never really find it ...
so i put all devices in difference and it was working(the voodoo has no medium so i put medium 
to the max for example).....but those patches are obsoletes now,the last work better...et de loin...