Retopo/move along normals

[rimasson]

Here is my problem:

I've got a non symetrical reference model

I created a new topo on one side

desactivated the auto snap (useful feature, thanks)

mirrored my model

now, i need to match the reference model as close as possible before snapping the mirrored topo

and i need an improvement to the move tool :

I'd like to be able to move topo along normals.

Thanks