Fitted one of these last year when I rebuilt the trailer,lots of use for the season and flushed after every launch/recovery.Stripped hubs and drums off last weekend for start of season,Surprise,surprise,every thing clean and corrosion free,even those hard-to-get at corners where the rust normally gets
Bearings and seals were also in very good nick due to not being that old and the use of bearing savers !
I will be fitting this to any trailer I own in the future,it does work,the initial cost is offset by the cost of brake shoes and backplates on a regular basis.
25% of a whale circumcision team - FOUR SKIN DIVERS!!