My latest pet project is seeing how far I can upgrade a basic Sidewinder with Level 5 Engineer tweaks. She's a work in progress, but she'll reach 660m/sec boosted with 4 pips in Engines, is maneuverable as hell, and has a 24 light-year jump range. She mounts an efficient, auto-loading multicannon and a range-enhanced beam laser, as well as two point-defense units.
