I have the 10' New Deal. The stock thruster fins are way too much fin. Maybe they work better in the smaller boards.
After trying many different fin set ups, what works best is 3.75 small side bites with the Futures Lost Single Fin-6.25. Works really well. Loose, fast, drive.
What also worked well was the same small side bites with the FCS Harley Longboard center fin.... but lacked a bit of drive but still super fun.
I might try it as a single for the heck of it.