[NSW] Improved points operation

["Chris Downs" <cvdowns@ozemail.com.au>]

Does the recent absence of points failures at critical locations have
anything to do with addition of a couple or rollers beneath point blades?

I've noticed these additions on the AL junction points, OP/main west
junction at Lidcombe, points on the OP loop and some other points as well.
The rollers are easily identified by their bright yellow casings (which are
largely free of grime so far).

Can anyone add more info on the use of these bearings, do they ease the work
the points motor does or eliminate seizing?

Chris