Easier to attach filler on the cabinet first, then cut the filler so cabinet moves over to desired position to then slide in last cabinet. Trickier when its only one cabinet wall to wall.
You guys kill me. You must be charging the poor customer triple if youre killing time with foolishness like this. Cut the filler, do a nice caulk bead to the wall and touchup. Done in a fourth of the time and ive never had a single customer complain.