>feeding the antenna between this top of the load coil and the antenna. Instead of the traditional
connection where the coax goes to ground and the bottom of the load coil.<
FWIW, I recall my Dad operated a surplus telescoping mast as a vertical with a "loading" coil at the base & the RG-8 coax feed line want to an adjustable tap on the coil. The transmitter was a homebrewed twin 813 beast & I don't know what the matching circuit might have been.