Getting boards on the straight and narrow path

Q: I am installing some new 5/8″ hard wood floors, glue down over concrete. My home has a large floor plan and a large island in the kitchen, while meeting up around the island I noticed the 2 pieces had a slight gap. Unfortunately, I noticed this after the panel was down. I would like to rip down the existing piece to continue in a straight path, and sort of hide the mistake. Do you recommend I do this with a skill saw or router with a straight edge in place as a guide?

Any other suggestions?

A: Are you saying you are going to “rip” the board that is glued to the floor? I think I would opt for the Skil saw approach. Make sure the blade is sharp so it doesn’t wander on you.