Hi David,

1. Since 3.5*sqrt(3) would truncate, round up when applying it. You do not
need to round to an integer though (and 7 is 2 voxels). You could use 6.07.
2. The 3dClustsim threshold is in voxels, so multiply by 6.07.
3. That looks okay from the help, but I have not used it.

Note that you can use the Clusterize part of the afni GUI to do this, and
even have it print out a corresponding command. To get touching corners,
use NN level 3 (1 is the default: touching faces).

- rick