Don't have to have that surge capacitor online if not needed, sadly our locomotive stuff has run currents around 1 to 5 amps and inrush at 70+ amps sometimes. So on SMPS supplies they sit there and go twitch, twitch, twitch, twitch, run. Unless I have the stabilizing cap online. I put stackable banana plugs on my cap. The old Sorensons (we have 1, 2 and 3kw versions) all have current limiting AND huge output capacitors. Sometimes you need REAL safety current limiting, and sometimes you need to simulate two 32 volt railroad batteries in series, each 3ft long, 2.5 feet wide and 1.5 feet tall capable of not dropping below 50 volts when drawing 1500 amps on a cool morning, but you don't have room in the lab for the batteries, or the safety assholes won't let you have them in the lab "Because they say so!!!". I'm not sure if a .1uf cap charged to 75vdc would kill an LED or not, I have seen a lot of 'high quality' SMPS units with a .1uf across their outputs, guessing for noise reduction. But then again, not to many of the dudes on this board have supplies upwards of 30-50 volts anyway. 72vdc on a running locomotive gives you a nasty bite or sting when the weather is dry and your hands are dry, but it will rock your world in your hands are damp/wet or you have a nasty unprotected cut on your hands, which seems to happen a lot when working on locomotives!!