I have owned a VL for over twenty years, and am vary happy with it. I disassemble the paint cones after every use. But not the air head, that's done once a year to replace the o-ring. I also use a Badger 200H, this is also disassembled after every use. If your getting bent needles and scratchs, one has to ask, what are you cleaning with? I use kleenx, Q-tips and pipe cleaner. For a cleaner, Laquier thinner for enamels and laquiers, a mixture of rubbing alcohol and denatured alcohol for the acrylics. I found for good painting and long life, keep the air brush clean and mantained, treat them as delicate insturments when disassembling and reassembling. It make the painting sessions a little longer but saves on replacement parts.
As to you thought of a gravity feed air brush I too am looking into this as I some times paint in such small amounts, that one of these may ease the paint waste problem.
Hope this helps and good luck