Hey
JackDonn, from the pages read within the Forum I haven't found a direct link to reference the technique to assist you with your query. Typically the technique suggested by other Members to loosen the adhesion where glue is used is by gradual waving of a constant heat source like a hair-dryer. This is then followed by gently easing the 'part' to first signs of no resistance. This method however has mostly been used on the threaded parts consistent to fore-grips and emitters though so I cannot say with certainty if the principle would be equally as effective for the switch.
Since you are intending on upgrading the sound immediately upon delivery, is it an option to submit a production request to Customer Service, requesting that glue not be used to secure the switch? This would be of great advantage to you as the only attachment of the switch would be the internal locking nut hence enabling you to perform what you have to and then apply the glue yourself upon completion.
If I have success with finding a direct reference I shall update it here.
EDIT:
@JackDonn, these are the references I found. They may be identical to what your search has resulted, it may not, however based on the limited information your query has stemmed from it should be useful.
1. Within the Forum
2.
Outside the Forum
3.
Continuation to Point 2.
While I'm here in an EDIT, @Gaelis and wrote:
is there a specific tool for gripping/ turning the internal locking nut, or is it just a case of needle-nose pliers?
Depending on the Hilt relative to SF Tier Type, the shortest distance from Switch(es) to opening would ordinarily be from Emitter end. It will also depend on Switch type used for the install. Needle nose Pliers will do the trick however in addition to (again depending on distance) a pencil with an eraser on the end works very effectively. MacGyver style would be to use a screw driver with a covered tip or to cut a rubber glove fingertip and wrap screw driver end. There may be a specific tool available but one that has remained elusive to me and unidentified.