<font face="Arial, Verdana">ok, thanks for your fast reply,</font>
<font face="Arial, Verdana">I'll try as soon as possible.</font>
<font face="Arial, Verdana">But, a further courtesy, you say: or switch active extruder...</font>
<font face="Arial, Verdana">how I do it?</font>
<font face="Arial, Verdana">thanks again</font>