"twin fins"

I had a discussion with Bill Thrillkill about his use of two fins about two inches apart - and if I remember correctly, he suggested it would be good as a “center” fin set up on a thruster lay out. Any thoughts on this?

I’ve been digging my “quad” - with the back fins about 5" from the tail and equal distant from the rail and the stringer. So far I’ve been using two side fins, as I don’t have two center fins to try. I may just put two boxes two inches apart on another semi-gun, but I’d like to know what people think about distance from tail.

What??? Seriously - no one has a thought? Not even a suggestion for distance from tail? Well - I’ll let you know what I end up doing… Maybe I’ll just go forward an inch… My own version of relativity… Ha!