mid print filament change?

I have been running a print for about 6 hours, and I have 2 hours left.

I believe I will run out of filament on my current roll in about 1 hour.

Is there anyway to put in a new roll of filament mid print?

I have the same color, from the same source so it should be exactly the same, just not sure how to do it without ruining my print, and I really don't want to lose 7 hours worth of printing.

Any help would be appreciated.

if you're using pronterface you could try hitting pause and then immediately hit Z-axis up 10, it might take a few seconds for it to follow the pause and move up command or it might be instant. Press the buttom for Motors Off, then set your bed and hot end temperature to where they were during the print, and just carefully turn the large herringbone gear to reverse the flow of filament, load up the new one and turn the gear to start pushing the filament through the extruder until you see it extruding through the hot end at ~1:1 ratio with your turning of the gear. just be careful not to extrude directly on top of the print, i usually put a paper towel lightly down on top of the print so it wont land on the print. once it's loaded, Z-10 down and resume immediately as well

Thanks! I'll give it a shot.