Sign of Echo
Allow the switching between lams%e_sign=1 to lams%e_sign=-1 vice versa. In future this should be given in echo files (than get this upon reading...) OR may be inferred from the magnetic setup (requires more configuration input and connection to newmag or similar).
The fist priority would be to include this into the data flies. Until then allow explicit spec. e.g. as a pramater of the read command.