Yours looks good to me. To be fair though, the low F doesn't really stand out in the Cosmo's Factory original - I'd never noticed it until today! The walking thing works well if dropped in occasionally to leaven things a bit, but not on every measure.
One thing you can do to mess with your guitarse's head is to drop in the riff to In-A-Gadda_Da-Vida. It fits surprisingly well.
Psalm 37:8 ...do not fret, it leads only to evil. Blues Bass Players Club # I-IV-II.
Aria Pro II SB-1000 FrankenFretless, SB-900, TSB-400, ZZB Custom.