I see Rusty offers a 9 blade plastic radiator fan for the 123s, compared to the stock 6 blade aluminum one. Has anyone tried the 9 blade one to see if it offers any noticeable cooling improvement? Is it
noisier?

It's quieter.  The SDL was forcibly upgraded when it got its new clutch.
(As the old metal-fan rated clutch was NLA.) It's supposed to cool better,
too.  It has asymmetrical blade spacing so that it doesn't howl as much.

-- Jim


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