The shock bolt is 8x40mm, and you need bushings or needle bearings to fit 8x30.
I went with the RWC needle bearing kit since the eyelet end is the one that rotates on the FM1002 and 1001. So far it’s been great.
If you want to run bushings I’d suggest pressing out the metal ring that RS puts in their eyelets (for use with their full metal bushings) and running Fox DU polymer bushings.