Vistor,
The arrestors have one or more very fine plastic screens. They are not homemade. They come in different sizes for different throughput. Contace Bruce directly through the email seller link on the eBay add and ask him what you'd need for that much output.
Steve
1991 Plymouth Acclaim 3L V6.
1 dry cells with nineteen 6"x8" 316L ss plates, driven by constant current PWM set at 35 amps (13.3V at PWM). 28% KOH electrolyte. Total measured output 2.5 lpm. Mileage went from 18 to 26 mpg, all city driving (44% increase). EFIE set at .370 and I still need to play with ignition timing.