The R doesn't come with pivot balls for the hangers. So the pivot balls that you buy from TD will be the full fat version that come in the kits.
As above, should just drop straight in and be free as anything.
Shouldn't be tight at all.
When i broke mine, I just got some pivot balls off Mr Skelding and they just fitted straight in perfectly.
Odd.
These ones?-
http://www.team-durango.com/part-inf...artNo=TD330037