Couldn't find any way to add on issue on the Labs github repo or another place to provide tiny suggested improvements (seemed overkill to put together a pull request for this).
Anyway, in the labs sphere network there's a sphere and a raycast operation to get a subdivided box to shift so it's a unit sphere. Should be much cheaper (and likely more accurate, I'd expect) to do with a tiny wrangle.
@P = normalize(@P) * 0.5;
Cheers,
Alan.