The Captain Fin "Chiipa Especial Twin" Fins are serving me well.
I got them to put on a old Lightning Bolt twin fin that I have acquired, which had its original fins removed, I know, who would do that! The retro colour and look did come into play as wanted to match the board colour.
Performance wise they have held the line throughout some classic old school turns and roundhouse cutbacks. I am yet to try them out in barreling waves, but am confidant that they will work in those conditions.
In regards to the trailer, I enjoy riding twin fins for the nature and flow of a twin fin, so initially did not have the trailer in, however I have started riding with it in and still enjoying the same flow with some secret stability.