RE: ZIROLI P-61 BLACK WIDOW BUILD
Sam, here is a schematic for an air setup, nose gear two mains, UP-3 valve and two large tanks. The fail safe is from tam jet [link=http://www.tamjets.com/gearfailsafe.php]click here[/link] and it is worth every nickel. I set mine on 50psi...
I numbered mine with Home Depot electrical wire numbers (around $3)