Boom preventer: Antal low-friction ring vs turning block opinions?

[JohnV]

I'm considering using an Antal low-friction ring in place of turning blocks on my boom preventer. The current design is, the (Sta-set X) preventer line runs from boom-end through a large snatchblock on the foredeck back to a turning block aft of the primary winch, thence through a rope clutch to the winch. The boat is a heavy 33' cruiser (Alajuela).
The load on it, as I see it and when in use downwind, is normally static and minimal with occasional minor bumping from the boom in light air. The real load would be a shock in the event of an accidental gybe, and then during the process of easing pressure off the line. So I question the need for a (more complex & costly) block, given all of that. Seems to me that actual drag or friction in its intended use would be an advantage, rather than an obstacle.
By the same logic I could use another ring in place of the block at the foredeck, from where the preventer line returns to the boom end.
Thanks for any thoughts or opinions on this.
John V.