Hi Tony,

A nose ring controls the side motion of the propeller during any maneuver where load increases beyond 1G. For hard mounted engines and certain types of "soft" mounts, it isn't required. However, for the Hyde style soft mounts which provide complete rubber isolation from the airframe, a nose ring really helps control the prop, maintaining its centering through any maneuver no matter how violent.

A plane still flies okay without it but you will notice some wander as you pull or push even moderately hard for squares for example.

Anyway, I will post some photos of my set-up soon.