Awesome mod! Tested it on 0.19.1, it brings no game breaking. Even more, this engine brings variety in game, you have to think in terms of discrete pulses, not continuous flow of thrust. Of course it needs to have thrust control by changing frequency of pulses and some strap-on pulse-units tanks to change mission profile on VAB stage in terms of delat-V. But even in this state, i repeat, this mod is very, very good! Waiting eagerly for 0.20 adaptation I`m sad and disappointed that our countries abandoned this excellent propulsion system. Sorry for my english, obviously lacking proper grammar, cause i`m russian P.S Nyrath, i want to thank you for your awesome site which is so informative, addictive and interesting. I`ve learned so much about spacefaring, reading it whole through (yeah, apparently i can read well, but my speech is soooo bad... ).