Trox i have a 441 Juki like your machine. The right and left toes are the only thing i bought extra. I have made lots of holsters without the plate no problems at all, never really figured i needed one. As far as the feed dogs i can't say because my machine doesn't have them it just has a flat plate there. Made saddle bags and breifcase's and all kinds of other things to no problem. I use the left toe 99.9% of the time. But the right toe foot is nice to have when you need it.