It my understanding that inactive mech V-blades function as exactly the same as a normal mech sword regardless of size.
doesn't this allow for using the small vibro in inactive mode better than a normal sword for the bigger mech classes (over 65 Tons were a sword out-damages a active small vibro) since it only takes up one crit and is lighter vs a normal sword after 65 tons yet deals the same damage as it's conventional counterpart.
that almost sounds potentially exploit-ish to get a good physical weapon without having to waste crits and weight for it.
if deemed a legit exploit my suggested errata fix is to make a inactive mech vibro-blade deal half the damage of it's active mode.
