If i were to purchase a bulk quantity of air core (or better recommended material) for using with multiple projects and forming all different sizes and shape inductors for several different projects, what size should i go with.? If there's a more suitable material i would love to know. Most applications will be rf power amps, filters, and other radio mods. Size is takin into account as I'm not very knowledgeable with this yet. I'm looking to buy (example) a whole roll of a Particular gauge you recommend for me to make alarge array of calls values with. Variable style would be nice but that seems to good to be true in this application. Thanks in advance.