Doh! You are right, of course. My head is stuck in the standard doubling approach. You are pre-copying into an upcoming buffer. Which, as you say, is going to

Doh! You are right, of course. My head is stuck in the standard doubling approach. You are pre-copying into an upcoming buffer. Which, as you say, is going to be weird with the language model, since the "same" thing exists in two different places. In C++, it would encounter problems with either a destructor or a copy constructor. I still think it's a cool trick for a realtime setup for arrays of trivial types.