great work
and yes there is miles of wiring (hope you labelled it all )
re the erg and charcoal canister , most bin these bits ( I didn't use them)
re the outer diff mounts, 2 choices really either a new talon diff mount or if keeping as is then hard mount it you will need to get inserts made, there was a build thread that detailed them (stot's or skov's build thread if I remember rightly) getting the old ones out is a pain
no stopping you now