SS20 case glue?

I dropped a SS20 today.  (Well, it's more like, I thought I had it
secured, but a critical strap holding it came undone unexpectedly.)  It
fell maybe four feet onto a wooden porch.

The case top broke, with three pieces covering maybe 15-20 square
inches breaking off the main body of it.  The metal piece into which
the screw at the back left of the machine screws also bent.  (It was
easy to bend back.)

But I consider that good, because in the breaking it absorbed enough of
the energy of the fall that the machine itself appears to have
survived.  I'd much rather have a working machine and a broken case
than a broken machine in an intact case.  (And I count myself lucky; if
it had waited five more minutes, it would have been more like six feet
onto pavement, instead, quite possibly in the middle of traffic.)

But it does prompt me to ask if anyone knows what sort of glue will
work on that plastic.  I've tried using acetone to solvent-weld it in
the past (for much more minor damage), with no success.  Anyone have
success stories to share?

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