This is a little ModuleManager tweak that turns the Vector from a special-purpose engine that's great for (and pretty much limited to) space shuttle replicas, into a general-purpose upper-tier engine for 1.25m rocket stacks.   It keeps the same TWR, but mass and thrust are both reduced to 45% of stock. (So it now has a bit more than twice the thrust of a Swivel.) Price is dropped by a lot, to 25% the original (which gives it the same cost per thrust as the Mammoth) Gimba