Hi, I just received two Lollar Imperial Humbuckers for replacement of stock pups in a 92 les paul standard. Is this a difficult job to do? I have to decide whether to try it myself or take it to a shop (with a 1 week turn around time). I am mainly concerned about getting stuck in the middle of the job and also proper setup upon reinstallation (IE pickup height and such). I haven't soldered anything in about 20 years or so. Any suggestions? Thx!!