The covers on my Italia Maranello Semi Hollow 2HB (Wilkinsons apparently) are quite microphonic. Didn't really notice until I did a recording. So now when recording I take care not to pick where I'm going to hit the (usually neck) pickup. Out of curiosity, after putting a Cavalier Twin Lion King (2-tap single coil) in the neck spot of my (Tele clone) Peavey Reactor, I tried tapping it with a pick and it doesn't seem microphonic at all. So, physics lovers, what's going on here?