This forum is for specialized infomation important to the construction and safe operation of the high voltage electrical supplies and related circuitry needed for fusor operation.
Rich, It appears to me that your diagrammed connections would work to accomplish a slightly larger bucking ratio. It still looks like the full load current is only going through the larger gauge LV windings. They don't have this connection scheme in their instruction sheet. I don't now if there is a reason for not doing this.