"The Evil Twin" is a new twin fin + trailer combo developed not just for the "Evil Twin" board model, but for any boards that revel on twin fin flare.
Coming straight from Matt "Mayhem' Biolos
"The template is a literal replica of our original twin fins designed for our original RNF close to 25 years ago. A friend in Florida recently dug up an actual mid 90's pair of these hand foiled 2 tabs twins and sent them to me, claiming these large surface area fins relevance today. We immediately prototyped with Futures and loved them. An upright fin, with a swept back tip, and plenty of area. They provide drive and precise pivot. We paired them with a smaller then average trailer, which helps draw out turns and lends some stability and projection, yet retains a free feeling, twin fin feel. I recently used a prototype set on my setups, solid backside, overhead Indo surf, where I never thought a twin fin would perform so well, I would actually forget I was using them"