No worries - something clicked yesterday with the approach I was previously taking with the Javascript side of things, based on something else entirely that I had done in another application, and things came together quickly as a result.
Once v2.0.1 has been approved, I've got a v2.1 ready to go and that introduces user control over the quote truncation functionality...I'll allow a couple of days for potential bug-fixes before I put that out though.