i was fitting this kit into an epiphone sg-g400....the cavity is much smaller than a les paul guitar,i found the fitment very straightforward--only to find that there was not room in cavity for 9v battery!....with the pots being long shaft type...i maybe could have pushed them through the holes further--but i did not want the control knobs to be sticking out 1/2 inch!.....so i extended the two wires to the battery,then routed out a slot underneath the pickguard,where the battery now sits,out of site.everything works perfectly,--very pleased with the performance of pickups,emg say that the battery should be changed every twelve months--so it's just a case of removing pickguard--no hassle!.....thanks!