I've been reading about tele neck pups and the effect of the brass covers. My tele neck pickups are my least favorite and that is because I don't play anything that benefits from the relatively dull tone. So I searched for nickel silver tele neck covers and I didn't find any good popular options. Is this an unpopular mod? I thought it would be very popular and if it isn't common is that because it doesn't make much difference? Can you recommend a good source of nickle silver covers? There seem to be more sources of open tele neck covers. Should I get one of them instead?