Hey guys,
Castors are smooth, and will work well if you have some smooth programming skills. I know several teams that use them year in and year out. We are from central jersey, and I think team 56 (from a neighboring town) uses them every year. I hope I am not mistaken, but they work very well for them and they are almost always at the top of the rankings.
I would suggest practicing for the next week, and if you just dont like it, switch em out.
Also, you might want to consider some sort of ball grabber, I can't see one, but maybe its just me not looking hard enough.
Good luck!