Titanium MicroFlex Ultra and Smart System Rotary models: R9170, R9270, R9370, R9500, R9100, R9200, R9250, R9300, and R9350 (SP-18 and SP-21 Replacement Heads)
Titanium MicroFlex Rotary models: R-200S, R450, R450S, R650, R650S, R-950 and R-960 (SP-29 / SP-19 Replacement Heads)
Discontinued models: RR-35, RR-41, RR-42, RR-50, RR-55, DT-35, DT-41, DT-42, DT-45, DT-50 (SP-10 / SP-11 Replacement Heads)
European models (series): R1, R3, R5, and R7
According to R’ Dovid Feinstein, the only shavers ok to use without any adjustemtns are the Norelco Rotary Lift and Cut, after the adjustments have been made.
It seems as if your shaver is no good to use at all, according to these poskim. You may want to contact a posek who is skilled in these areas on the specifics of your shaver, but it seems that R’ Dovid Feinstein does not approve any of the new Remington shavers.