Hi All: I have no experience modding and maybe one of you can give me some advice. I've got a 5129 I got used- love the pickups but the guitar was cheap for a reason ( or rather several reasons.) A lovely, near mint, orange (I'm a sucker for orange) 5120 has cone up for sale nearby. I'd like to buy it and swap out the stock Gretchbuckers with the DeArmonds from the 5129. Does anybody know if the fit would be good into the 5120? On a related note, why won't Gretsch make a 5420 with single coils? I'd buy one in a heartbeat. Thanks in advance for any hints.