Would it be offensive to modify the Pathfinder torch when designing a SAR tattoo?

SSG Christopher Parrish, first, I agree with SFC Casey O'Mally: Its your body do what you want.

However, your question indicates to me that you are sensitive to how your design may be perceived by others. The obvious issue may be with the use of a design that can clearly be interpreted as the Pathfinder torch, without having actually been to course. Imagine the conversation with an actual pathfinder when they ask about the tattoo. The same thing would go for the SEAL trident or the word "Sapper" over a castle. Even altered, many people can spot the meaning from a mile away. It why we buy Army swag, to display pride and association.

I had family serve in the Marine Corps and they all have some form of the globe and anchor tattooed in visible locations. I imagine a conversation with someone who never served in the corps would not result in mutual understanding of interpretive art.

At the end of the day, the act of modifying military logos and insignia (and getting them tattooed) goes way back. I don't think anyone would be "offended" by the modification of the torch.

Your body, your art.

Tribute tattoos are a sticky scenario. Everybody wants a cool tat but nobody wants it to be misunderstood. The fact you are asking the question tells you already had concerns. It's your body so it's ultimately your choice but I would recommend doing your best to avoid things that could cause issues.