I'm using the flyback board on my Accel 72lb injectors. You can "get away" without using the flyback board, but ONLY if you remote mount the flyback transistor to the MS case, using heat sink compound and a machine nut/bolt. That transistor just gets too hot for the MS board to disipate the heat generated by low impedance injectors, but if you remote mount it, it should be sufficient. It's always best to use the flyback board with any low imp injector though. It does provide *slightly* faster injector opening and closing times.

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)