The all new Mark Richards MR Twin + 1 set combines the best performance features of a twin fin and a thruster. 
 
"Being pure foiled fiberglass, the construction of my new Futures Fin set mirrors the tradition flex characteristics of a hand-foiled fin cut from a multi layered fiberglass fin panel. The twin + 1 configuration gives the board a twin fin performance feel, with additional speed and maneuverability. The small rear stabilizer fin adds a degree of positive control and predictability.
 
The outline template is over 20 years old. I developed it sometime around 2000 in response to a request from Soeda Surfboards Japan to make some twin fins for the team riders. Feedback from Soeda team riders was positive, the loved the boards! The moment I got the feedback I got excited and shaped myself a modern twin fin with the twin + 1 setup. 24 years later I'm still surfing with these fins and totally frothing on them!!!"
 
 - Mark Richards