Hey sideoftheroad Yes the single center screw through the cone to an adapter thats screwed onto the end of the crankshaft is the best type of spinner. Sometime long,medium and short adapters are avalible to suit your components and yes this method has been used since the begineings of Nitro engines.
My apologies on the black ring thing. The black rings are endemic on plastic spinners and very difficult to avoid especialy when an inverted engine mount is used. It is caused when a starter is applied to an inverted engine that may not be properly cleared, as the result is the ugly burned in black ring. And I was serious if you go plastic do choose black so this will not be so noticible.
John