Is there a way to slit the backer paper on Graphtec 8600 plotter

[shortstack23]

We have a large order of polystyrene signs. My production guy wants to perf cut each of these and then apply them to the polystyrene substrate. His plan for application to is to put a seam down the middle and then apply one side of the graphic at a time, and we're wondering if there's a way to load the print in a second time, and have the machine cut the slit in the backer paper instead of doing it by hand. My question is if there's a way to program a cut into the machine on a stroke instead of a closed path to make the split. And on top of that, has anyone tried/had success with running the same sheet twice in the machine and cutting on both sides of the vinyl??

 

[JBurton]

My question is if there's a way to program a cut into the machine on a stroke instead of a closed path to make the split.

I've never had a problem sending line segments to my 8600, depending on which version of cutting master you're using, there is a setting called something like auto-weld, that would just need to be unchecked. Can't say if flexi would give you fits.
As far as running a print upside down on the plotter, I wouldn't, I feel like the lower grit roller that actively turns would scar the face, but I've never tried it.
BigFish sells a crack and peel, that already has slit backing, but the slits are ever 1.25", so depending on the size of signage, and whether the slits always split apart, it could make it pretty tedious.