Yes, use Graemes reverse filter. FCPs own reverse is horrible. It’s like you described it, very jerky, because of the reversed fields.
I always use Graemes.
BTW. his Film Effects filters is highly recomended.
Regards
MartinW
Martin Wehding, Editor.
Fabelfilm.
Final Cut Pro 4.1
G5 Dual 2GHz, 1Gb ram
500Gb LaCie Big, FW800
2x320Gb LaCie Big, FW800
23″ Cinema display
BM DeckLink Extreme