Mast Mountable J-Pole Antenna, but with decoupling 1/4-wave stub?

[www.hamradio.me] Boomer, found this. Huh... Well, the other ways that ops have done mast and coax decoupling is to use ferrite clamps, or wind a few turns at feed-point with the coax. I should modify the custom 462 / 467 MHz GMRS repeater J-Pole to this.