Hey @A1955Harley , I got a set of their JJ split coil pups.
Once I managed to get them installed, they sound just fine. They really are much quieter compared to normal J pickups, with a rounder, fatter sound.
Things to look out for:
They are split coils. If you open them, you have two smaller coils with 4 pole pieces each. Each coil has two VERY thin (I mean, half a blond one on the CH scale thin) wires coming out to towards two soldered dots at the edge of the pickup bottom plate, for a total of four. On the first coil one wire from the winding leads to the red (hot) wire to the coil, and the other to the crossover into the second coil. On the second coil, one wire from the windings leads to the crossover between the coils, and the other one leads to the black (ground) wire going out of the pickup. There is a third wire (in my pups: red), on the undeside of the pup which is the crossover between the coils.
When I installed these, the neck pup was no problem. In the bridge one, however, I broke one of the wires leading from the first coil into the crossover. This is where I’d have a look in your pup, give how one side is weak. The wires leading out of the coils are really flimsy, and may have gotten loose. Also, check the pole pieces and string height over the pup.
My description of my adventures with Dragonfire JJ pups starts here: