oh well, I like it the way it is...4 impulse means extra acceleration.
Whenever I think of impulse engines, acceleration and such... for some reason propellers come into mind, propulsion.
with having 2 impulse engines you can run them at 50% each to gain the same 100% as you would with one impulse engine (yes, i know 50% from 2 sources isnt exactly the _same_ as 100% as from one, 100% from two sources would mean running both at 100% efficiency but you know what i mean), now which one sounds more sound for structural integrity? you know, equal 50% thrust from 2 points offers a steadier ride than 100% from one