RE: Spinner size for PL PROD Smaragd
Its really an 84mm....
The Tru-turn 3.25" FAI spinner is the one you want. Its slightly smaller diameter...Just stick a 1/16" spinner gap and it looks fine.
If you really want PL makes a CF spinner that I believe is the proper size 84mm....Numbers I have heard and seen are about $125 US....The tru-turn is about $40 US
Your choice