I installed this switch with my new Bare Knuckle Blackguard Tele Flat'50 Set into 2016 USA G&L ASAT Classic deluxe to make use of both pickups in series as a humbucker and after a day of soldering, since I'm not very experienced with an iron, I was astonished to first hear the new sound. The 4th possition added a whole new sound, making my tele into a jazz machine and switchable for mellow lead tones.
The switch doesnt feel as sturdy as a G&L 3-way made in US, but it works, so I have no complains.
To conduct, it is a nobrainer since you can add your tele humbucking option just for 25 euros.