I built a couple of these for some other guys, and i was getting 1.2 - 1.4 on the upper bands, and 1.4-1.5 in the target region of the 75 m band, around 3.900 mHz. Of course, tuning may change in an attic due to wiring, piping, duct work, whereas I tweeked these antennas in my yard.
Segments A and B are 20 meters.
Segments C and D are 15 meters.
Segments E (along with red coil and segment A) and F(along with blue coil and segment B) is 75 meters.
Segments G (along with brown coil and segment C) and H (along with green coil and segment D) is 40 meters.
If resonance is where it should be, for example, 20 meters at 14.200 mhz, but SWR is too high, try adjusting the offset by winding one turn more onto the inside of the red coil, and taking a turn off the inside of the blue coil. That will maintain the length, but shift the feedpoint. If SWR is worse, go the other way with it.
Ditto 15 meters.
Fine tuning 75 and 40 meters, if resonance is where you want it, but SWR too high, try taking off a turn from the outside of the coils on one side, add a turn on the outside of the coil on the opposite side, keeping the same overall length.