26 ElectroTastic 2 weeks ago The offset guitar guys can get pretty argumentative over pickup choices in JM's.I bought a set from Tim McNelly (Canuckistan) for my JM and I could not believe the huge difference over the 63's. A set of these true vintage wound pickups in a JM give an incredibly versatile range. Not just quack and twang, but beautiful mellow cleans and the crunch is also there if you want it - on tap. The underlying 'fender' signature clarity is always there, and a subtle twang can be dialled right up or out as much as you like with the tone controls.Bear in mind however, that a Jazzmaster has two separate tone circuits. This is what ultimately makes everything so easy and versatile with it.I personally wouldn't put them on a hollowbody, and only on a semihollow if I knew the routing wouldn't break through the sides of the centreblock. JM pickups mount differently to humbuckers, in that the JM's are shimmed from the back with dense foam pads, and the pickup cover holds the pickup down onto the pads.... so in effect adjusting the hight is 'in reverse' from a normal humbucker.I would recommend spending a small amount on a jazzmaster with the traditional tone circuits and then get rid of the standard pickups. Swap them out for whatever you like - SD antiquity 2's, lollar, lindy fralin, Kinman HX's, McNelly's or whatever floats your boat. The one's I've mentioned are probably the most popular selection with the offset guys, and as I mentioned.... it's a topic that can start a forest fire... On a Gretsch, I'd go for something that mounts in the standard manner, I wouldn't chop into the body unless it was a totally expendable instrument.