Can you please elaborate on the spacers...? Are you talking bout wheel spacers? Thanks
If you remove the dust shields then you will have a gap when putting your Hub back together. I don't think this is a really big deal but I didn't want to take that chance. They are technically call Back Plate Eliminators.
https://www.trail-gear.com/TG/Backing_Plate_Eliminator_Kit/i_0_0_/_140058-1-KIT.aspx#.Vyo1ifkrJpg
I agree prob not be any big deal... still... The other option would be to trim the old ones... If you cared to address the void where these were.
They are too tight if you don't, at least on mine. Pass side is buttoned up other than the shim issue... and it all went as planned/expected/hoped 
especially if the main Bene is 100 series pads last longer... I don't care that much being they are pretty easy to change...
all buttoned up...