Most of our orchestral models are installed the same way. The elements are friction fit between the leg and the thigh of the bridge. Either adjust the bridge or the element. Let's start with bridge.
The fit should be lightly taught. Material can be removed from the wing or the bridge to widen the gap using a file. If the gap is too wide you can use wood to shim the pickup, typically done on the flat work side. Some times they will fit right in without any modifications. It varies from instrument to instrument.
The Northern Lutherie elements can be reshaped with heat, Using a lighter simply heat up the element. Then the formula turns pliable (hold brass side up to increase crown size. Brass side down to decrease crown size.) The compound needs to stay as centered as possible so you may have to shift it in other directions to accomplish this. There are demonstation videos under Media on the website and youtube. This is dangerous and can cause injury which we will take no responsibility for. If you are struggling with installation, give us a call. Keep in mind we can send custom pickups to get you a close fit.
The 1/4" jack installs using friction fit as well. Simply remove the 1st string and thread it through the eye of the R-clip, The ball end of the string will hold the jack securely to the tailpiece. You could also notch out the eye of the R-clip, however that will not be as secure.
Our warranty covers anytrhing. Just send it back and we will replace it, or repair it.
If Installation is not something you feel comfortable with take it to a professional luthier.
Our models for banjo, the single sensor unit, is called, “The Institution.” The Dual Sensor unit is called the “Parity Prince.” Installation is very straight forward, The elements are glued using a medium viscosity super glue near the feet of the bridge, typically, slightly behind the bridge feet (underside of the head). The half inch R-clip is used to fasten the jack in place either on a resonator thumb screw, or by removing a drum lug, and sandwiching it between the lug and the lug nut. It is designed so an instrument would not have to be modified for installation.