Hey there Jack,Good luck and a speedy recovery from your impending surgery. Just to be on the safe side, do,with a marking pen, draw a line safely below "those" parts you wish to protect. Just above said demarcation write " DO NOT cut above this line".
Although the Canadian output of distillates is not my normal cup o tea , in order to ensure a continued favorable balance of trade, I too will do my part in your name.

Mark