Help! Cfab Trailing arm bearing install. Think I messed up..

I was pressing in all balls trailing arm bearing into my cfab extended trailing arms. Finished the first one and sat it to the side , started second one. Pushed both bearings in one side of trailing arm went to grab inner spacer. And oh *hit, there are still 2 inner spacers laying on my bench.. dam it. I’m kicking myself..

Do I really need those inner spacers? My cfab arms are machined for the bearing so they will only go in so far before they hit the inner lip.