Yes, I use 0.001, but the problem is when you want study the effect in the potencial with 1 week of every training, or if you want add sublevels or levels and see the value of this changes.
For example the total potencial could be lower than the potencial of add levels.
This could be confused for average users, the same with negative potencial.
I used it here:http://bbtools.x10.mx/potencjal/Is it possible to translate everything in English?
I used it here:http://bbtools.x10.mx/potencjal/