[pgb]

Many thanks for all the above. I do take on board some of the comments; I'm aware it doesn't have to be psi (or whatever) as written, but was wanting to explore fitting it in with other psi powers, and was also considering doing without it and constructing a version from other advantages. But the worked example from Psionic Powers is just what I needed - I'm embarrassed to say I missed it before.

Thanks,

Paul.