Well I'm digging into whammy bar usage like never before.
Tuning is holding up quite well and I'm seriously considering getting a 'Tele' version...

5 days in then TWANG!!
E six and D four stings suddenly let go.
Investigating the result
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Both broke where they bend around the main shaft by the looks.
I remember noticing some increased 'creaks' from this area over the past day.
I'm also using an el-cheapo "Darco" brand strings from JB-HiFi.

The action has risen somewhat and the saddles are in their lowest setting down on the body.
So I've put a shim in the neck and replaced the 2 strings.
I'll now give it another work-out and see if the issue recurs.
May have to try better quality strings...
Then if the problem persists perhaps some strengthening solder to that area of new strings.

cheers, Mark.